Skip to main content

Interactions between Chloroquine and Delta-Cortef

No drug interactions found, but 55 warnings to review for the following 2 drugs:

Add/remove drugs

Drug interactions

There were no interactions found between chloroquine and Delta-Cortef. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.

Food/lifestyle interactions

Moderate food/lifestyle interactions

Moderate:

chloroquine Food/Lifestyle

Applies to: chloroquine
Generally avoid

Theoretically, grapefruit and grapefruit juice may increase the plasma concentrations of hydroxychloroquine or chloroquine and the risk of toxicities such as QT interval prolongation and ventricular arrhythmias. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall induced by certain compounds present in grapefruit. Following coadministration with cimetidine, a weak to moderate CYP450 3A4 inhibitor, a 2-fold increase in chloroquine exposure occurred. Since chloroquine and hydroxychloroquine have similar structures and metabolic elimination pathways, a similar interaction may be observed with hydroxychloroquine. In general, the effect of grapefruit juice is concentration-, dose- and preparation-dependent, and can vary widely among brands. Certain preparations of grapefruit juice (e.g., high dose, double strength) have sometimes demonstrated potent inhibition of CYP450 3A4, while other preparations (e.g., low dose, single strength) have typically demonstrated moderate inhibition. Pharmacokinetic interactions involving grapefruit juice are also subject to a high degree of interpatient variability, thus the extent to which a given patient may be affected is difficult to predict.

Adjust dosing interval

Administration with food or milk may reduce the incidence of hydroxychloroquine-related gastrointestinal adverse effects.

Management

Although clinical data are lacking, it may be advisable to avoid the consumption of grapefruit, grapefruit juice, and any supplement containing grapefruit extract during hydroxychloroquine or chloroquine therapy. Hydroxychloroquine should be administered with food or milk to reduce the occurrence of gastrointestinal upset.

References (5)
  1. (2024) "Product Information. Hydroxychloroquine Sulfate (hydroxychloroquine)." Dr. Reddy's Laboratories Inc
  2. (2023) "Product Information. Plaquenil (hydroxychloroquine)." Sanofi-Aventis Canada Inc
  3. (2024) "Product Information. Quinoric (hydroxychloroquine)." Bristol Laboratories Ltd
  4. (2024) "Product Information. Hydroxychloroquine (GH) (hydroxychloroquine)." Generic Health Pty Ltd
  5. (2023) "Product Information. HIDROXICLOROQUINA RATIOPHARM (hidroxicloroquina)." RATIOPHARM ESPANA S.A.
Moderate:

prednisoLONE Food/Lifestyle

Applies to: Delta-Cortef (prednisolone)
Monitor

Concomitant use of systemic corticosteroids (e.g., prednisolone) with alcohol or products containing alcohol may increase gastrointestinal irritation and the risk of ulceration and bleeding. The proposed mechanism has not been fully elucidated but may involve additive mucosal irritation.

Monitor

Coadministration with grapefruit or grapefruit juice may increase the plasma concentrations of systemic corticosteroids. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruit. In general, the effect of grapefruit juice is concentration-, dose- and preparation-dependent, and can vary widely among brands. Certain preparations of grapefruit juice (e.g., high dose, double strength) have sometimes demonstrated potent inhibition of CYP450 3A4, while other preparations (e.g., low dose, single strength) have typically demonstrated moderate inhibition. Pharmacokinetic interactions involving grapefruit juice are also subject to a high degree of interpatient variability, thus the extent to which a given patient may be affected is difficult to predict.

Management

Caution is advised if corticosteroids and alcohol are used together, especially in patients with a prior history of peptic ulcer disease or gastrointestinal bleeding. Patients should be advised to report signs and symptoms of gastrointestinal ulceration and/or bleeding such as severe abdominal pain, dizziness, lightheadedness, and the appearance of black, tarry stools. Patients who regularly consume grapefruit or grapefruit juice should be monitored for adverse effects and for changes in corticosteroid plasma concentrations.

References (5)
  1. (2024) "Product Information. PrednisoLONE Sodium Phosphate (prednisoLONE)." Chartwell RX, LLC., 2
  2. (2025) "Product Information. Andriga-10 (abiraterone-prednisolone)." Actor Pharmaceuticals Pty Ltd
  3. (2023) "Product Information. Pediapred (prednisolone)." Sanofi-Aventis Canada Inc
  4. (2021) "Product Information. Redipred (prednisolone)." Aspen Pharmacare Australia Pty Ltd
  5. (2023) "Product Information. Prednisolone Sodium Phosphate (prednisolone)." Advanz Pharma

Disease interactions

53 potential interactions Applies to: 50 conditions, including High Blood Pressure, High Cholesterol, Depression, Underactive Thyroid, and Heart Failure.

Abnormal Glucose Tolerance

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Abnormal Glucose Tolerance.

Corticosteroids can raise blood glucose level by antagonizing the action and suppressing the secretion of insulin, which results in inhibition of peripheral glucose uptake and increased gluconeogenesis. Therapy with corticosteroids should be administered cautiously in patients with diabetes mellitus, glucose intolerance, or a predisposition to hyperglycemia. Patients with diabetes mellitus should be monitored more closely during corticosteroid therapy, and their antidiabetic regimen adjusted accordingly.

Adrenal Tumor

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Adrenal Tumor.

Corticosteroids mimic the effects of endogenous cortisol and aldosterone. Use of these agents may aggravate conditions of hyperadrenocorticalism in a dose-dependent manner.

Alcoholism

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Alcoholism.

Aminoquinolines may concentrate in the liver. Isolated cases of abnormal liver function and fulminant hepatic failure have been reported. Therapy with aminoquinolines should be administered cautiously in patients with hepatic disease or alcoholism and in patients receiving other hepatotoxic drugs. Periodic evaluation of hepatic function should be performed during prolonged therapy.

Arrhythmia

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Arrhythmia.

The use of 4-aminoquinolines such as hydroxychloroquine and chloroquine prolong the QT interval. Ventricular arrhythmias and torsades de pointes have been reported in patients taking these agents. Care should be exercised in patients with a prolonged QT interval at baseline or at increased risk for arrythmia. A baseline electrocardiogram should be obtained to assess for QT interval prolongation and other abnormalities. It is recommended to use appropriate diagnostic tools such as ECG to monitor patients during therapy.

Bone Marrow Depression/Low Blood Counts

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Bone Marrow Depression/Low Blood Counts.

Adverse hematologic effects including neutropenia, agranulocytosis, aplastic anemia, and thrombocytopenia have been rarely associated with 4-aminoquinolines. Therapy with 4-aminoquinolines should be administered cautiously in patients with preexisting bone marrow suppression. A complete blood count should be performed periodically in patients on prolonged therapy. If any severe blood disorder appears which is not attributable to the disease under treatment, discontinuance of the drug should be considered.

Cataract

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Cataract.

Prolonged use of corticosteroids may cause posterior subcapsular cataracts and elevated intraocular pressure, the latter of which may lead to glaucoma and/or damage to the optic nerves. Long-term therapy with corticosteroids should be administered cautiously in patients with a history of cataracts, glaucoma, or increased intraocular pressure.

Cirrhosis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Cirrhosis.

Corticosteroids may have enhanced effects on patients with cirrhosis due to decreased metabolism of these agents. Patients with cirrhosis should be monitored more closely for excessive cortisol effects. Dosage adjustments may be required in these patients.

Depression

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Depression.

Corticosteroids may aggravate the symptoms of psychosis and emotional instability. Patients with these conditions should be monitored for increased or worsened symptoms during corticosteroid therapy.

Diabetes Mellitus

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Diabetes Mellitus.

Corticosteroids can raise blood glucose level by antagonizing the action and suppressing the secretion of insulin, which results in inhibition of peripheral glucose uptake and increased gluconeogenesis. Therapy with corticosteroids should be administered cautiously in patients with diabetes mellitus, glucose intolerance, or a predisposition to hyperglycemia. Patients with diabetes mellitus should be monitored more closely during corticosteroid therapy, and their antidiabetic regimen adjusted accordingly.

Diverticulitis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Diverticulitis.

Corticosteroids may cause gastrointestinal perforation and hemorrhage, usually when given in high dosages or for prolonged periods. They may also mask symptoms of complications such as peritonitis or intraabdominal sepsis. Therapy with corticosteroids should be avoided or administered cautiously in patients with diverticulitis, nonspecific ulcerative colitis (if there is a probability of impending perforation, abscess, or other pyogenic infection), or recent intestinal anastomoses.

Electrolyte Abnormalities

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Electrolyte Abnormalities.

Corticosteroids can cause hypernatremia, hypokalemia, and fluid retention. These mineralocorticoid effects are most significant with fludrocortisone, followed by hydrocortisone and cortisone, then by prednisone and prednisolone. The remaining corticosteroids, betamethasone, dexamethasone, methylprednisolone, and triamcinolone, have little mineralocorticoid activities. However, large doses of any corticosteroid can demonstrate these effects, particularly if given for longer than brief periods. All corticosteroids also increase excretion of calcium and can cause hypocalcemia. Therapy with corticosteroids should be administered cautiously in patients with preexisting electrolyte disturbances. Caution is also advised when treating patients with seizure disorders, since electrolyte disturbances may trigger seizure activity.

Fluid Retention

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Fluid Retention.

Corticosteroids may cause hypernatremia, hypokalemia, fluid retention, and elevation in blood pressure. Large doses of any corticosteroid can demonstrate these effects, particularly if given for longer periods. Therapy with corticosteroids should be administered cautiously in patients with preexisting fluid retention, hypertension, congestive heart failure, and/or renal dysfunction. Dietary sodium restriction and potassium supplementation may be advisable.

G-6-PD Deficiency

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with G-6-PD Deficiency.

Hemolysis and acute renal failure have been reported during use of aminoquinolines in patients with glucose-6-phosphate dehydrogenase (G-6-PD) deficiency. Therapy with aminoquinolines should be administered cautiously in these patients. Blood cell counts and hemoglobin determinations should be performed regularly. Aminoquinoline therapy should be discontinued immediately if signs suggestive of hemolytic anemia occur, such as marked darkening of the urine or sudden decrease in hemoglobin concentration or erythrocytic count.

Glaucoma/Intraocular Hypertension

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Glaucoma/Intraocular Hypertension.

Prolonged use of corticosteroids may cause posterior subcapsular cataracts and elevated intraocular pressure, the latter of which may lead to glaucoma and/or damage to the optic nerves. Long-term therapy with corticosteroids should be administered cautiously in patients with a history of cataracts, glaucoma, or increased intraocular pressure.

Hearing Loss

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Hearing Loss.

The use of 4-aminoquinolines has been associated rarely with ototoxicity. Nerve-type deafness, which is usually irreversible, has occurred during long-term, high-dose therapy. Deafness may not be apparent until several weeks after 4-aminoquinoline therapy. Tinnitus and reduced hearing have been reported in patients with preexisting auditory damage. Therapy with 4-aminoquinolines should be administered cautiously in such patients. If new auditory defects develop or if hearing loss becomes worse, therapy should be immediately discontinued and the patient closely monitored.

Heart Attack

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Heart Attack.

The use of corticosteroids may be associated with left ventricular free-wall rupture in patients who have had a recent myocardial infarction. Pharmacologic dosages of corticosteroids should be administered with great caution in such patients.

Heart Failure

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Heart Failure.

Corticosteroids may cause hypernatremia, hypokalemia, fluid retention, and elevation in blood pressure. Large doses of any corticosteroid can demonstrate these effects, particularly if given for longer periods. Therapy with corticosteroids should be administered cautiously in patients with preexisting fluid retention, hypertension, congestive heart failure, and/or renal dysfunction. Dietary sodium restriction and potassium supplementation may be advisable.

Herpetic Keratitis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Herpetic Keratitis.

Pharmacologic dosages of corticosteroids should be used cautiously in patients with ocular herpes simplex because of the risk of corneal perforation. Corticosteroids are not recommended for patients with active ocular herpes simplex.

High Blood Pressure

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with High Blood Pressure.

Corticosteroids may cause hypernatremia, hypokalemia, fluid retention, and elevation in blood pressure. Large doses of any corticosteroid can demonstrate these effects, particularly if given for longer periods. Therapy with corticosteroids should be administered cautiously in patients with preexisting fluid retention, hypertension, congestive heart failure, and/or renal dysfunction. Dietary sodium restriction and potassium supplementation may be advisable.

High Cholesterol

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with High Cholesterol.

Corticosteroids may elevate serum triglyceride and LDL cholesterol levels if used for longer than brief periods. Patients with preexisting hyperlipidemia may require closer monitoring during prolonged corticosteroid therapy, and adjustments made accordingly in their lipid-lowering regimen.

History, Peptic Ulcer

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with History, Peptic Ulcer.

Corticosteroids may cause peptic ulcer disease and gastrointestinal (GI) hemorrhage, usually when given in high dosages or for prolonged periods. However, even conventional dosages may aggravate symptoms in patients with a history of peptic ulcers. Delayed healing of ulcers has also been reported. Therapy with corticosteroids should be avoided or administered cautiously in patients with active or latent peptic ulcers or other risk factors for GI bleeding. Some clinicians recommend the use of prophylactic antacids or H2-antagonists between meals when large doses of corticosteroids are necessary.

History, Thrombotic/Thromboembolic Disorder

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with History, Thrombotic/Thromboembolic Disorder.

Corticosteroids may increase blood coagulability and have rarely been associated with the development of intravascular thrombosis, thromboembolism, and thrombophlebitis. Therapy with corticosteroids should be administered cautiously in patients who have or may be predisposed to thrombotic or thromboembolic disorders.

History, Tuberculosis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with History, Tuberculosis.

In patients with latent tuberculosis or tuberculin reactivity, the use of pharmacologic dosages of corticosteroids may cause a reactivation of the disease. Close monitoring for signs and symptoms of tuberculosis is recommended if corticosteroid therapy is administered to patients with a history of tuberculosis or tuberculin reactivity. During prolonged corticosteroid therapy, tuberculosis chemoprophylaxis may be considered.

Hyperadrenocorticism

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Hyperadrenocorticism.

Corticosteroids mimic the effects of endogenous cortisol and aldosterone. Use of these agents may aggravate conditions of hyperadrenocorticalism in a dose-dependent manner.

Hyperaldosteronism

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Hyperaldosteronism.

Corticosteroids mimic the effects of endogenous cortisol and aldosterone. Use of these agents may aggravate conditions of hyperadrenocorticalism in a dose-dependent manner.

Hypernatremia

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Hypernatremia.

Corticosteroids can cause hypernatremia, hypokalemia, and fluid retention. These mineralocorticoid effects are most significant with fludrocortisone, followed by hydrocortisone and cortisone, then by prednisone and prednisolone. The remaining corticosteroids, betamethasone, dexamethasone, methylprednisolone, and triamcinolone, have little mineralocorticoid activities. However, large doses of any corticosteroid can demonstrate these effects, particularly if given for longer than brief periods. All corticosteroids also increase excretion of calcium and can cause hypocalcemia. Therapy with corticosteroids should be administered cautiously in patients with preexisting electrolyte disturbances. Caution is also advised when treating patients with seizure disorders, since electrolyte disturbances may trigger seizure activity.

Hypocalcemia

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Hypocalcemia.

Corticosteroids can cause hypernatremia, hypokalemia, and fluid retention. These mineralocorticoid effects are most significant with fludrocortisone, followed by hydrocortisone and cortisone, then by prednisone and prednisolone. The remaining corticosteroids, betamethasone, dexamethasone, methylprednisolone, and triamcinolone, have little mineralocorticoid activities. However, large doses of any corticosteroid can demonstrate these effects, particularly if given for longer than brief periods. All corticosteroids also increase excretion of calcium and can cause hypocalcemia. Therapy with corticosteroids should be administered cautiously in patients with preexisting electrolyte disturbances. Caution is also advised when treating patients with seizure disorders, since electrolyte disturbances may trigger seizure activity.

Hypokalemia

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Hypokalemia.

Corticosteroids can cause hypernatremia, hypokalemia, and fluid retention. These mineralocorticoid effects are most significant with fludrocortisone, followed by hydrocortisone and cortisone, then by prednisone and prednisolone. The remaining corticosteroids, betamethasone, dexamethasone, methylprednisolone, and triamcinolone, have little mineralocorticoid activities. However, large doses of any corticosteroid can demonstrate these effects, particularly if given for longer than brief periods. All corticosteroids also increase excretion of calcium and can cause hypocalcemia. Therapy with corticosteroids should be administered cautiously in patients with preexisting electrolyte disturbances. Caution is also advised when treating patients with seizure disorders, since electrolyte disturbances may trigger seizure activity.

Infection

Major:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a major potential interaction with Infection.

The immunosuppressant and anti-inflammatory effects of corticosteroids, particularly at higher dosages, may reduce resistance to infectious agents, increase the risk of disseminated infections, mask symptoms of infection, and reactivate or exacerbate latent/resolved infections; fatal cases have been reported. Avoid use of corticosteroids in patients with cerebral malaria. Screen patients for active (or history of) infection with tuberculosis, hepatitis, varicella, measles, and amebiasis, especially prior to prolonged treatment. Closely monitor for reactivation of latent infections; chemoprophylaxis may be required. In general, corticosteroids should not be used in patients with active infections, especially systemic fungal infections, unless medically necessary to control drug reactions. However, for corticosteroid-dependent patients who develop a severe or life-threatening infection, continuation of corticosteroid therapy with at least physiologic replacement dosages should be considered, since these patients may have secondary adrenocortical insufficiency. Removal of external steroid during periods of stress may be detrimental to these patients.

Intestinal Anastomoses

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Intestinal Anastomoses.

Corticosteroids may cause gastrointestinal perforation and hemorrhage, usually when given in high dosages or for prolonged periods. They may also mask symptoms of complications such as peritonitis or intraabdominal sepsis. Therapy with corticosteroids should be avoided or administered cautiously in patients with diverticulitis, nonspecific ulcerative colitis (if there is a probability of impending perforation, abscess, or other pyogenic infection), or recent intestinal anastomoses.

Liver Disease

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Liver Disease.

Aminoquinolines may concentrate in the liver. Isolated cases of abnormal liver function and fulminant hepatic failure have been reported. Therapy with aminoquinolines should be administered cautiously in patients with hepatic disease or alcoholism and in patients receiving other hepatotoxic drugs. Periodic evaluation of hepatic function should be performed during prolonged therapy.

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Liver Disease.

Corticosteroids are primarily metabolized by the liver and may have enhanced effects in patients with liver disease. Dosage adjustments may be necessary in these patients.

Myasthenia Gravis

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Myasthenia Gravis.

Certain aminoquinolines such as chloroquine, and hydroxychloroquine should be used with caution in patients with myasthenia gravis (MG). These agents may exacerbate or trigger new onset of symptoms in patients with previously diagnosed MG. It is recommended to advise patients with MG about this possible side effect.

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Myasthenia Gravis.

Although corticosteroids are commonly used in the treatment of myasthenia gravis to increase muscle strength, these agents should nevertheless be administered with caution in such setting. Patients should be treated in an intensive care unit and receive respiratory support, since muscle strength may markedly decrease initially, particularly with high dosages. Preferably, therapy should begin with relatively low dosages (15 to 25 mg/day of prednisone or equivalent) and be increased stepwise as tolerated (approximately 5 mg/day of prednisone or equivalent at 2- to 3-day intervals until marked clinical improvement or a dosage of 50 mg/day is reached). Improvement may be delayed and gradual. Thus, it is important not to discontinue therapy prematurely.

Myoneural Disorder

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Myoneural Disorder.

Toxic myopathy has been observed with the chronic use or the administration of large doses of corticosteroids, often in patients with disorders of neuromuscular transmission such as myasthenia gravis or in patients receiving neuromuscular blocking agents. Fluorinated corticosteroids such as betamethasone, dexamethasone, and triamcinolone appear to cause more severe muscle atrophy and weakness than the nonfluorinated agents. Moreover, multiple-daily doses are more toxic than once-daily or, preferably, alternate-day morning doses. Steroid myopathy is generalized and sometimes accompanied by respiratory weakness and dyspnea. In some cases, it has resulted in quadriparesis. Elevations of creatine kinase (CK) may also occur, albeit infrequently. After withdrawal of corticosteroid therapy, recovery may be slow and incomplete. Therapy with corticosteroids should be administered cautiously in patients with preexisting myopathy or myoneural disorders since these conditions may confound the diagnosis of steroid-induced myopathy. The presence of a normal serum CK level, minimal/no changes of myopathy on electromyography, and type 2 muscle fiber atrophy on biopsy are helpful in suggesting steroid-induced weakness. If steroid myopathy is suspected, a dosage reduction or discontinuation of the steroid should be considered.

Myopathy

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Myopathy.

Toxic myopathy has been observed with the chronic use or the administration of large doses of corticosteroids, often in patients with disorders of neuromuscular transmission such as myasthenia gravis or in patients receiving neuromuscular blocking agents. Fluorinated corticosteroids such as betamethasone, dexamethasone, and triamcinolone appear to cause more severe muscle atrophy and weakness than the nonfluorinated agents. Moreover, multiple-daily doses are more toxic than once-daily or, preferably, alternate-day morning doses. Steroid myopathy is generalized and sometimes accompanied by respiratory weakness and dyspnea. In some cases, it has resulted in quadriparesis. Elevations of creatine kinase (CK) may also occur, albeit infrequently. After withdrawal of corticosteroid therapy, recovery may be slow and incomplete. Therapy with corticosteroids should be administered cautiously in patients with preexisting myopathy or myoneural disorders since these conditions may confound the diagnosis of steroid-induced myopathy. The presence of a normal serum CK level, minimal/no changes of myopathy on electromyography, and type 2 muscle fiber atrophy on biopsy are helpful in suggesting steroid-induced weakness. If steroid myopathy is suspected, a dosage reduction or discontinuation of the steroid should be considered.

Osteoporosis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Osteoporosis.

Corticosteroids reduce osteoblastic function and inhibit the absorption of intestinal calcium, which can result in bone resorption and bone loss during prolonged therapy. In addition, bone matrix may be affected by the protein-catabolic effects of corticosteroids, especially when given in high dosages or for prolonged periods, leading to aseptic necrosis and fractures. Long-term or high-dose corticosteroid therapy should be administered cautiously and only if necessary in patients with or at risk for osteoporosis. Adverse skeletal effects may be minimized by alternate-day or intermittent administration. Any patient receiving prolonged therapy with the equivalent of 7.5 mg prednisone/day or more are at risk for glucocorticoid-induced osteoporosis and should be managed according to The American College of Rheumatology (ACR) guidelines.

Peptic Ulcer

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Peptic Ulcer.

Corticosteroids may cause peptic ulcer disease and gastrointestinal (GI) hemorrhage, usually when given in high dosages or for prolonged periods. However, even conventional dosages may aggravate symptoms in patients with a history of peptic ulcers. Delayed healing of ulcers has also been reported. Therapy with corticosteroids should be avoided or administered cautiously in patients with active or latent peptic ulcers or other risk factors for GI bleeding. Some clinicians recommend the use of prophylactic antacids or H2-antagonists between meals when large doses of corticosteroids are necessary.

Porphyria

Major:

chloroquine

Chloroquine has a major potential interaction with Porphyria.

The use of aminoquinolines in patients with porphyria may exacerbate the condition. Aminoquinolines should not be used in these patients unless the potential benefits are anticipated to outweigh the risks.

Post MI Syndrome

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Post MI Syndrome.

The use of corticosteroids may be associated with left ventricular free-wall rupture in patients who have had a recent myocardial infarction. Pharmacologic dosages of corticosteroids should be administered with great caution in such patients.

Prematurity/Underweight in Infancy

Major:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a major potential interaction with Prematurity/Underweight in Infancy.

The use of certain parenteral formulations of dexamethasone, hydrocortisone, methylprednisolone, prednisolone and triamcinolone is considered by the drug manufacturers to be contraindicated in neonates, particularly premature infants and infants of low birth weight. Some formulations of these drugs contain benzyl alcohol which, when used in bacteriostatic saline intravascular flush and endotracheal tube lavage solutions, has been associated with fatalities and severe respiratory and metabolic complications in low-birth-weight premature infants. However, many experts feel that, in the absence of benzyl alcohol-free equivalents, the amount of the preservative present in these formulations should not necessarily preclude their use if they are clearly indicated. The American Academy of Pediatrics considers benzyl alcohol in low doses (such as when used as a preservative in some medications) to be safe for newborns. Continuous infusions of high dosages of medications containing benzyl alcohol may, however, cause toxicity and should be avoided if possible.

Psoriasis

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Psoriasis.

The use of aminoquinolines in patients with psoriasis may precipitate a severe attack of psoriasis. Aminoquinolines should not be used in these patients unless the potential benefits are anticipated to outweigh the risks.

Psychosis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Psychosis.

Corticosteroids may aggravate the symptoms of psychosis and emotional instability. Patients with these conditions should be monitored for increased or worsened symptoms during corticosteroid therapy.

Renal Dysfunction

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Renal Dysfunction.

Corticosteroids may cause hypernatremia, hypokalemia, fluid retention, and elevation in blood pressure. Large doses of any corticosteroid can demonstrate these effects, particularly if given for longer periods. Therapy with corticosteroids should be administered cautiously in patients with preexisting fluid retention, hypertension, congestive heart failure, and/or renal dysfunction. Dietary sodium restriction and potassium supplementation may be advisable.

Retinal Disorders

Major:

chloroquine

Chloroquine has a major potential interaction with Retinal Disorders.

The use of 4-aminoquinolines is generally considered contraindicated in the presence of retinal or visual field changes, whether attributable to 4-aminoquinoline compounds or to any other etiology. However, in the treatment of acute attacks of malaria caused by susceptible strains of plasmodia, these agents may be considered if potential benefits are anticipated to outweigh the risks. 4-aminoquinolines are oculotoxic and can cause dose-related, irreversible retinal damage and vision loss during and up to several years after long-term or high-dose therapy (e.g., in the treatment of systemic lupus erythematosus or rheumatoid arthritis). Ophthalmologic monitoring, including visual acuity, expert slit-lamp, funduscopic, and visual field tests, is recommended at baseline and every three months during prolonged use. Therapy should be discontinued immediately if abnormalities develop in visual acuity, visual field, or retinal macular areas (e.g., pigmentary changes, loss of foveal reflex), or if the patient experiences visual symptoms such as light flashes and streaks that are not fully explainable by difficulties of accommodation or corneal opacities. Other common symptoms that may indicate retinopathy include nyctalopia, photophobia, blurred distance vision, difficulty reading or seeing (e.g., words or letters disappearing or parts of objects missing; misty vision; fog before the eyes), and missing or blacked out areas in the central or peripheral visual field. Retinal changes and visual disturbances may progress even after cessation of therapy. However, in a number of patients, early retinopathy (macular pigmentation sometimes with central field defects) diminished or regressed completely after therapy was discontinued. Paracentral scotoma to red targets, sometimes termed premaculopathy, is indicative of early retinal dysfunction and is usually reversible with cessation of therapy.

Seizures

Moderate:

chloroquine

Chloroquine has a moderate potential interaction with Seizures.

4-aminoquinolines may cause epileptic seizures in susceptible individuals. Patients with epilepsy or an otherwise low seizure threshold may be at greater risk. Therapy with 4-aminoquinolines, particularly chloroquine, should be administered cautiously in patients with epilepsy.

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Seizures.

Corticosteroids can cause hypernatremia, hypokalemia, and fluid retention. These mineralocorticoid effects are most significant with fludrocortisone, followed by hydrocortisone and cortisone, then by prednisone and prednisolone. The remaining corticosteroids, betamethasone, dexamethasone, methylprednisolone, and triamcinolone, have little mineralocorticoid activities. However, large doses of any corticosteroid can demonstrate these effects, particularly if given for longer than brief periods. All corticosteroids also increase excretion of calcium and can cause hypocalcemia. Therapy with corticosteroids should be administered cautiously in patients with preexisting electrolyte disturbances. Caution is also advised when treating patients with seizure disorders, since electrolyte disturbances may trigger seizure activity.

Strongyloidiasis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Strongyloidiasis.

Unlike most helminths, Strongyloides stercoralis has the ability to replicate in the human host. In patients with strongyloidiasis, the use of pharmacologic or immunosuppressive dosages of corticosteroids may result in Strongyloides hyperinfection and dissemination with widespread larval migration, often accompanied by severe enterocolitis and potentially fatal gram-negative septicemia. Therapy with corticosteroids should be administered with extreme caution, if at all, in these patients. For patients on corticosteroids who develop known or suspected Strongyloides infestation, withdrawal of corticosteroids or reduction of the dose of corticosteroids is recommended.

Systemic Sclerosis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Systemic Sclerosis.

In patients with scleroderma, corticosteroids may precipitate renal crisis with malignant hypertension, possibly via steroid-induced increases in renin substrate and angiotensin II levels and decreases in vasodilator prostaglandin production. Renal failure may ensue. Therapy with corticosteroids should be administered cautiously in patients with scleroderma. In addition, they should be limited to short-term use.

Thrombotic/Thromboembolic Disorder

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Thrombotic/Thromboembolic Disorder.

Corticosteroids may increase blood coagulability and have rarely been associated with the development of intravascular thrombosis, thromboembolism, and thrombophlebitis. Therapy with corticosteroids should be administered cautiously in patients who have or may be predisposed to thrombotic or thromboembolic disorders.

Tuberculosis, Latent

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Tuberculosis, Latent.

In patients with latent tuberculosis or tuberculin reactivity, the use of pharmacologic dosages of corticosteroids may cause a reactivation of the disease. Close monitoring for signs and symptoms of tuberculosis is recommended if corticosteroid therapy is administered to patients with a history of tuberculosis or tuberculin reactivity. During prolonged corticosteroid therapy, tuberculosis chemoprophylaxis may be considered.

Ulcerative Colitis

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Ulcerative Colitis.

Corticosteroids may cause gastrointestinal perforation and hemorrhage, usually when given in high dosages or for prolonged periods. They may also mask symptoms of complications such as peritonitis or intraabdominal sepsis. Therapy with corticosteroids should be avoided or administered cautiously in patients with diverticulitis, nonspecific ulcerative colitis (if there is a probability of impending perforation, abscess, or other pyogenic infection), or recent intestinal anastomoses.

Underactive Thyroid

Moderate:

Delta-Cortef

The prednisoLONE in Delta-Cortef has a moderate potential interaction with Underactive Thyroid.

Corticosteroids may have enhanced effects in hypothyroidism due to decreased metabolism of these agents. Patients with hypothyroidism should be monitored more closely for excessive cortisol effects. Dosage adjustments may be required secondary to changes in their thyroid condition.

More resources

chloroquine

A total of 553 drugs are known to interact with chloroquine.

Delta-Cortef

A total of 674 drugs are known to interact with Delta-Cortef.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.