Can you take Adgan with Thiopental?
1 drug interaction and 40 additional warnings found for the following 2 drugs:
- Adgan (promethazine)
- thiopental
Drug interactions
Minor drug interactions
Minor:
thiopental promethazine
Applies to: thiopental and Adgan (promethazine)
Information for this minor interaction is available on the professional version.
Food/lifestyle interactions
Major food/lifestyle interactions
Major:
thiopental Alcohol (Ethanol)
Applies to: thiopental
Ask your doctor before using thiopental together with ethanol (alcohol), this can add to dizziness, drowsiness and other side effects of thiopental. Be careful if you drive or do activities that require you to be awake and alert. Talk with your doctor before using any medications together, or drinking alcohol with thiopental. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Moderate food/lifestyle interactions
Moderate:
promethazine Alcohol (Ethanol)
Applies to: Adgan (promethazine)
Ask your doctor before using promethazine together with ethanol (alcohol). This can cause uncontrollable movements, agitation, seizures, severe dizziness or fainting, coma, very deep sleep, irregular heartbeats, and high or low body temperature. Use caution when driving, operating machinery, or performing other hazardous activities, these medicaions may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Disease interactions
38 potential interactions Applies to: 35 conditions, including High Blood Pressure, Asthma, COPD, Seizures, and Arrhythmia.
Acute Alcohol Intoxication
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Acute Alcohol Intoxication.
Phenothiazines are contraindicated in the presence of large amounts of central nervous system depressants such as alcohol. The risk of suicide and the danger of overdose may be increased in patients who use alcohol excessively. Phenothiazines should be used with caution in patients experiencing alcohol withdrawal.
Adrenal Insufficiency
Major:
thiopental
Thiopental has a major potential interaction with Adrenal Insufficiency.
Thiopental should not be used in patients with Addison disease or any adrenal gland disorder.
Alcoholism
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Alcoholism.
Phenothiazines are contraindicated in the presence of large amounts of central nervous system depressants such as alcohol. The risk of suicide and the danger of overdose may be increased in patients who use alcohol excessively. Phenothiazines should be used with caution in patients experiencing alcohol withdrawal.
Altered Consciousness
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Altered Consciousness.
The use of phenothiazines is contraindicated in comatose patients and patients with severe central nervous system depression. Phenothiazines may potentiate the CNS and respiratory depression in these patients.
Anemia
Major:
thiopental
Thiopental has a major potential interaction with Anemia.
Thiopental should not be used in patients with severe anemia.
Arrhythmia
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Arrhythmia.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
Asthma
Major:
thiopental
Thiopental has a major potential interaction with Asthma.
Thiopental should not be used in patients with asthma as it can lead to intraoperative bronchospasm which can be catastrophic.
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Asthma.
It has been suggested that the anticholinergic effect of antihistamines may reduce the volume and cause thickening of bronchial secretions, resulting in obstruction of respiratory tract. Some manufacturers and clinicians recommend that therapy with antihistamines be administered cautiously in patients with asthma or chronic obstructive pulmonary disease.
Bone Marrow Depression/Low Blood Counts
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Bone Marrow Depression/Low Blood Counts.
Phenothiazines may cause hematologic toxicity. In patients with preexisting blood dyscrasias, bone marrow suppression, or a history of drug-induced leukopenia or neutropenia, phenothiazines should not be used or are contraindicated. Complete blood counts should be regularly monitored in patients with risk factors for blood dyscrasias. If white blood cell counts indicate cellular depression, discontinue treatment and institute appropriate therapy.
Breast Cancer
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Breast Cancer.
The chronic use of phenothiazines is associated with persistent elevations in prolactin levels. The clinical significance in patients with a history of breast cancer is unknown and should be considered prior to therapy; approximately one-third of human breast cancers are thought to be prolactin-dependent. Chronic administration of neuroleptic drugs has been associated with mammary tumorigenesis in animal studies; however, evidence is inconclusive in humans.
Cardiovascular Conditions and Disorders
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Cardiovascular Conditions and Disorders.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
Central Nervous System Disorders
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Central Nervous System Disorders.
Phenothiazines can lower the seizure threshold. Caution is recommended during administration in patients with a history of convulsive disorders or EEG abnormalities. Anticonvulsant therapy should be maintained or adequately adjusted during phenothiazine treatment.
Cerebrovascular Insufficiency
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Cerebrovascular Insufficiency.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
COPD
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with COPD.
It has been suggested that the anticholinergic effect of antihistamines may reduce the volume and cause thickening of bronchial secretions, resulting in obstruction of respiratory tract. Some manufacturers and clinicians recommend that therapy with antihistamines be administered cautiously in patients with asthma or chronic obstructive pulmonary disease.
Dehydration
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Dehydration.
Promethazine has weak central antidopaminergic activity. While its use is rarely associated with adverse effects secondary to dopaminergic blockade, large doses have produced extrapyramidal reactions. During chronic administration and/or high-dose therapy, the usual contraindications, warnings and precautions applicable to phenothiazines should be observed with promethazine.
Gastrointestinal Obstruction
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Gastrointestinal Obstruction.
Antihistamines often have anticholinergic activity, to which elderly patients are particularly sensitive. Therapy with antihistamines should be administered cautiously, if at all, in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as urinary retention or obstruction; angle-closure glaucoma, untreated intraocular hypertension, or uncontrolled primary open-angle glaucoma; and gastrointestinal obstructive disorders. Conventional, first-generation antihistamines such as the ethanolamines (bromodiphenhydramine, carbinoxamine, clemastine, dimenhydrinate, diphenhydramine, doxylamine, phenyltoloxamine) tend to exhibit substantial anticholinergic effects. In contrast, the newer, relatively nonsedating antihistamines (e.g., cetirizine, fexofenadine, loratadine) reportedly have low to minimal anticholinergic activity at normally recommended dosages and may be appropriate alternatives.
Glaucoma/Intraocular Hypertension
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Glaucoma/Intraocular Hypertension.
Antihistamines often have anticholinergic activity, to which elderly patients are particularly sensitive. Therapy with antihistamines should be administered cautiously, if at all, in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as urinary retention or obstruction; angle-closure glaucoma, untreated intraocular hypertension, or uncontrolled primary open-angle glaucoma; and gastrointestinal obstructive disorders. Conventional, first-generation antihistamines such as the ethanolamines (bromodiphenhydramine, carbinoxamine, clemastine, dimenhydrinate, diphenhydramine, doxylamine, phenyltoloxamine) tend to exhibit substantial anticholinergic effects. In contrast, the newer, relatively nonsedating antihistamines (e.g., cetirizine, fexofenadine, loratadine) reportedly have low to minimal anticholinergic activity at normally recommended dosages and may be appropriate alternatives.
High Blood Pressure
Major:
Adgan
The promethazine in Adgan has a major potential interaction with High Blood Pressure.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
History - Cerebrovascular Disease
Major:
Adgan
The promethazine in Adgan has a major potential interaction with History - Cerebrovascular Disease.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
History - Myocardial Infarction
Major:
Adgan
The promethazine in Adgan has a major potential interaction with History - Myocardial Infarction.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
Hypocalcemia
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Hypocalcemia.
Promethazine has weak central antidopaminergic activity. While its use is rarely associated with adverse effects secondary to dopaminergic blockade, large doses have produced extrapyramidal reactions. During chronic administration and/or high-dose therapy, the usual contraindications, warnings and precautions applicable to phenothiazines should be observed with promethazine.
Hypotension
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Hypotension.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
Liver Disease
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Liver Disease.
Therapy with phenothiazines should be administered cautiously or are contraindicated in patients with preexisting liver disease or with a history of jaundice due to phenothiazine hypersensitivity. Patients with a history of hepatic encephalopathy due to cirrhosis may have increased sensitivity to the central nervous system effects of some phenothiazines (e.g., chlorpromazine). Treatment should be discontinued if jaundice occurs.
Major:
thiopental
Thiopental has a major potential interaction with Liver Disease.
Thiopental should not be used in patients with liver dysfunction. The distribution half-life and the duration of the drug action will be prolonged.
Myasthenia Gravis
Major:
thiopental
Thiopental has a major potential interaction with Myasthenia Gravis.
Thiopental should not be used in patients with myasthenia gravis as it can prompt myasthenic crises.
Neuroleptic Malignant Syndrome
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Neuroleptic Malignant Syndrome.
Promethazine has weak central antidopaminergic activity. While its use is rarely associated with adverse effects secondary to dopaminergic blockade, large doses have produced extrapyramidal reactions. During chronic administration and/or high-dose therapy, the usual contraindications, warnings and precautions applicable to phenothiazines should be observed with promethazine.
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Neuroleptic Malignant Syndrome.
Therapy with phenothiazines may precipitate or aggravate a potentially fatal symptom complex known as neuroleptic malignant syndrome (NMS). Treatment should not be initiated in patients with active NMS, and should be immediately discontinued if currently administered in such patients. In patients with a history of NMS, introduction or reintroduction of phenothiazines should be carefully considered, since NMS may recur.
Parkinsonism
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Parkinsonism.
Promethazine has weak central antidopaminergic activity. While its use is rarely associated with adverse effects secondary to dopaminergic blockade, large doses have produced extrapyramidal reactions. During chronic administration and/or high-dose therapy, the usual contraindications, warnings and precautions applicable to phenothiazines should be observed with promethazine.
Pheochromocytoma
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Pheochromocytoma.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
Porphyria
Major:
thiopental
Thiopental has a major potential interaction with Porphyria.
The use of thiopental is contraindicated in patients with porphyria.
Pulmonary Impairment
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Pulmonary Impairment.
Promethazine is contraindicated for use in the treatment of lower respiratory tract symptoms including asthma. Furthermore, promethazine tablets may lead to potentially fatal respiratory depression, and its use should be avoided in patients with compromised respiratory function such as patients with COPD, and sleep apnea.
Renal Dysfunction
Major:
thiopental
Thiopental has a major potential interaction with Renal Dysfunction.
Thiopental should not be used in patients with renal impairment. If so, the dose needs to be considerably reduced.
Respiratory Arrest
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Respiratory Arrest.
The use of phenothiazines is contraindicated in comatose patients and patients with severe central nervous system depression. Phenothiazines may potentiate the CNS and respiratory depression in these patients.
Seizures
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Seizures.
Phenothiazines can lower the seizure threshold. Caution is recommended during administration in patients with a history of convulsive disorders or EEG abnormalities. Anticonvulsant therapy should be maintained or adequately adjusted during phenothiazine treatment.
Tardive Dyskinesia
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Tardive Dyskinesia.
Promethazine has weak central antidopaminergic activity. While its use is rarely associated with adverse effects secondary to dopaminergic blockade, large doses have produced extrapyramidal reactions. During chronic administration and/or high-dose therapy, the usual contraindications, warnings and precautions applicable to phenothiazines should be observed with promethazine.
Thyroid Disease
Major:
thiopental
Thiopental has a major potential interaction with Thyroid Disease.
Thiopental should not be used in patients with thyroid disorder as it influences thyroid metabolism.
Urinary Retention
Moderate:
Adgan
The promethazine in Adgan has a moderate potential interaction with Urinary Retention.
Antihistamines often have anticholinergic activity, to which elderly patients are particularly sensitive. Therapy with antihistamines should be administered cautiously, if at all, in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as urinary retention or obstruction; angle-closure glaucoma, untreated intraocular hypertension, or uncontrolled primary open-angle glaucoma; and gastrointestinal obstructive disorders. Conventional, first-generation antihistamines such as the ethanolamines (bromodiphenhydramine, carbinoxamine, clemastine, dimenhydrinate, diphenhydramine, doxylamine, phenyltoloxamine) tend to exhibit substantial anticholinergic effects. In contrast, the newer, relatively nonsedating antihistamines (e.g., cetirizine, fexofenadine, loratadine) reportedly have low to minimal anticholinergic activity at normally recommended dosages and may be appropriate alternatives.
Valvular Heart Disease
Major:
Adgan
The promethazine in Adgan has a major potential interaction with Valvular Heart Disease.
Phenothiazines may cause hypotension. Patients with pheochromocytoma, cerebral vascular or renal insufficiency, cardiovascular disease, or a severe cardiac reserve deficiency (e.g., mitral insufficiency) may be more prone to hypotensive reactions. Close monitoring is recommended during treatment if used in at-risk patients; some products may be contraindicated (e.g., thioridazine). Large doses and parenteral administration should be used cautiously, or avoided, in patients with impaired cardiovascular systems.
More resources
Adgan
A total of 714 drugs are known to interact with Adgan.
- Adgan is in the following drug classes: antihistamines, phenothiazine antiemetics.
- Adgan is used to treat the following conditions:
thiopental
A total of 278 drugs are known to interact with thiopental.
- Thiopental is in the drug class general anesthetics.
- Thiopental is used to treat the following conditions:
Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| 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. | |
| No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.