Can you take Lofexidine with Snooze Fast?
1 drug interaction and 30 additional warnings found for the following 2 drugs:
- lofexidine
- Snooze Fast (diphenhydramine)
Drug interactions
Moderate drug interactions
Moderate:
diphenhydrAMINE lofexidine
Applies to: Snooze Fast (diphenhydramine) and lofexidine
DiphenhydrAMINE and lofexidine may have additive effects in lowering your blood pressure. You may experience headache, dizziness, lightheadedness, fainting, or changes in pulse or heart rate, especially when treatment is started, the dose is changed, or treatment is restarted. Tell your doctor promptly if these symptoms occur and seek urgent medical help if you faint or have severe dizziness. Avoid driving or operating hazardous machinery until you know how the medications affect you, and use caution when getting up from a sitting or lying position. 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.
Food/lifestyle interactions
Moderate food/lifestyle interactions
Moderate:
lofexidine Food/Lifestyle
Applies to: lofexidine
Alcohol can increase the nervous system side effects of lofexidine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with lofexidine. Do not use more than the recommended dose of lofexidine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.
Moderate:
diphenhydrAMINE Alcohol (Ethanol)
Applies to: Snooze Fast (diphenhydramine)
Ask your doctor before using diphenhydrAMINE together with ethanol (alcohol). Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking diphenhydrAMINE. You should be warned not to exceed recommended dosages and to avoid activities requiring mental alertness. If your doctor prescribes these medications together, you may need a dose adjustment to safely take this combination. 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
28 potential interactions Applies to: 18 conditions, including Depression, Asthma, Heart Attack, COPD, and Arrhythmia.
Alcoholism
Moderate:
lofexidine
Lofexidine has a moderate potential interaction with Alcoholism.
Lofexidine can potentiate the CNS depressive effects of alcohol and other CNS depressive substances. Care should be exercised when using this agent in patients with alcohol disorders.
Arrhythmia
Moderate:
lofexidine
Lofexidine has a moderate potential interaction with Arrhythmia.
Lofexidine prolongs the QT interval. Its use should be avoided in patients with congenital long QT syndrome. It is recommended to monitor ECG prior to and during treatment in patients with congestive heart failure, bradyarrhythmias, hepatic impairment, renal impairment, or patients taking other medicinal products that lead to QT prolongation (e.g., methadone). Electrolyte abnormalities must be corrected prior to initiating therapy.
Asthma
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast 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.
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Asthma.
Oral anxiolytic, sedative, and hypnotic agents may cause respiratory depression and apnea when given in high dosages or following acute overdose. However, some patients may be susceptible at commonly used dosages, including the elderly, debilitated or severely ill patients, those receiving other CNS depressants, and those with limited ventilatory reserve, chronic pulmonary insufficiency or other respiratory disorders. Therapy with anxiolytic, sedative, and hypnotic agents should be administered cautiously in these patients. Appropriate monitoring and individualization of dosage are recommended.
Cardiovascular Conditions and Disorders
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Cardiovascular Conditions and Disorders.
Antihistamines may infrequently cause cardiovascular adverse effects related to their anticholinergic and local anesthetic (quinidine-like) activities. Tachycardia, palpitation, ECG changes, arrhythmias, hypotension, and hypertension have been reported. Although these effects are uncommon and usually limited to overdosage situations, the manufacturers and some clinicians recommend that therapy with antihistamines be administered cautiously in patients with cardiovascular disease, hypertension, and/or hyperthyroidism.
Cerebral Vascular Disorder
Major:
lofexidine
Lofexidine has a major potential interaction with Cerebral Vascular Disorder.
Lofexidine can cause a decrease in blood pressure, a decrease in pulse, and syncope. It is recommended to monitor vital signs before dosing and for symptoms related to bradycardia and orthostasis. If clinically significant or symptomatic hypotension and/or bradycardia occur, the next dose of lofexidine should be reduced in amount, delayed, or skipped. Avoid using lofexidine in patients with severe coronary insufficiency, recent myocardial infarction, cerebrovascular disease, chronic renal failure, and in patients with marked bradycardia.
COPD
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast 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.
Depression
Major:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a major potential interaction with Depression.
A variety of abnormal thinking and behavior changes have been reported to occur in association with the use of most anxiolytics, sedatives and hypnotics. Some of these changes include decreased inhibition, aggressiveness, agitation, and hallucinations. These drugs can cause or exacerbate mental depression and cause suicidal behavior and ideation. Therapy with these drugs should be administered cautiously in patients with a history of depression or other psychiatric disorders. Patients should be monitored for any changes in mood or behavior. It may be prudent to refrain from dispensing large quantities of medication to these patients.
Electrolyte Abnormalities
Moderate:
lofexidine
Lofexidine has a moderate potential interaction with Electrolyte Abnormalities.
Lofexidine prolongs the QT interval. Its use should be avoided in patients with congenital long QT syndrome. It is recommended to monitor ECG prior to and during treatment in patients with congestive heart failure, bradyarrhythmias, hepatic impairment, renal impairment, or patients taking other medicinal products that lead to QT prolongation (e.g., methadone). Electrolyte abnormalities must be corrected prior to initiating therapy.
Gastrointestinal Obstruction
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast 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:
Snooze Fast
The diphenhydrAMINE in Snooze Fast 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.
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Glaucoma/Intraocular Hypertension.
Some hypnotic drugs can have an anticholinergic effect and should be used with caution in patients with glaucoma, and trouble urinating due to retention or enlarged prostate.
Heart Attack
Major:
lofexidine
Lofexidine has a major potential interaction with Heart Attack.
Lofexidine can cause a decrease in blood pressure, a decrease in pulse, and syncope. It is recommended to monitor vital signs before dosing and for symptoms related to bradycardia and orthostasis. If clinically significant or symptomatic hypotension and/or bradycardia occur, the next dose of lofexidine should be reduced in amount, delayed, or skipped. Avoid using lofexidine in patients with severe coronary insufficiency, recent myocardial infarction, cerebrovascular disease, chronic renal failure, and in patients with marked bradycardia.
Heart Disease
Major:
lofexidine
Lofexidine has a major potential interaction with Heart Disease.
Lofexidine can cause a decrease in blood pressure, a decrease in pulse, and syncope. It is recommended to monitor vital signs before dosing and for symptoms related to bradycardia and orthostasis. If clinically significant or symptomatic hypotension and/or bradycardia occur, the next dose of lofexidine should be reduced in amount, delayed, or skipped. Avoid using lofexidine in patients with severe coronary insufficiency, recent myocardial infarction, cerebrovascular disease, chronic renal failure, and in patients with marked bradycardia.
Hyperthyroidism
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Hyperthyroidism.
Antihistamines may infrequently cause cardiovascular adverse effects related to their anticholinergic and local anesthetic (quinidine-like) activities. Tachycardia, palpitation, ECG changes, arrhythmias, hypotension, and hypertension have been reported. Although these effects are uncommon and usually limited to overdosage situations, the manufacturers and some clinicians recommend that therapy with antihistamines be administered cautiously in patients with cardiovascular disease, hypertension, and/or hyperthyroidism.
Hypotension
Major:
lofexidine
Lofexidine has a major potential interaction with Hypotension.
Lofexidine can cause a decrease in blood pressure, a decrease in pulse, and syncope. It is recommended to monitor vital signs before dosing and for symptoms related to bradycardia and orthostasis. If clinically significant or symptomatic hypotension and/or bradycardia occur, the next dose of lofexidine should be reduced in amount, delayed, or skipped. Avoid using lofexidine in patients with severe coronary insufficiency, recent myocardial infarction, cerebrovascular disease, chronic renal failure, and in patients with marked bradycardia.
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Hypotension.
Antihistamines may infrequently cause cardiovascular adverse effects related to their anticholinergic and local anesthetic (quinidine-like) activities. Tachycardia, palpitation, ECG changes, arrhythmias, hypotension, and hypertension have been reported. Although these effects are uncommon and usually limited to overdosage situations, the manufacturers and some clinicians recommend that therapy with antihistamines be administered cautiously in patients with cardiovascular disease, hypertension, and/or hyperthyroidism.
Liver Disease
Moderate:
lofexidine
Lofexidine has a moderate potential interaction with Liver Disease.
Lofexidine prolongs the QT interval. Its use should be avoided in patients with congenital long QT syndrome. It is recommended to monitor ECG prior to and during treatment in patients with congestive heart failure, bradyarrhythmias, hepatic impairment, renal impairment, or patients taking other medicinal products that lead to QT prolongation (e.g., methadone). Electrolyte abnormalities must be corrected prior to initiating therapy.
Moderate:
lofexidine
Lofexidine has a moderate potential interaction with Liver Disease.
Hepatic impairment slows the elimination of lofexidine, but exhibits less effect on the peak plasma concentration following a single dose. Dosage adjustments are recommended based on the degree of hepatic impairment. Close monitoring is recommended when using this agent in patients with hepatic impairment.
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Liver Disease.
In general, anxiolytics, sedatives and hypnotics are extensively metabolized by the liver. Their plasma clearance may be decreased and their half-life prolonged in patients with impaired hepatic function. Therapy with these drugs should be administered cautiously in patients with liver disease (some are not recommended in severe liver impairment), and the dosage should be adjusted accordingly. Laboratory testing is recommended prior and during treatment.
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Liver Disease.
Limited pharmacokinetic data are available for the older, first-generation antihistamines. Many appear to be primarily metabolized by the liver, and both parent drugs and metabolites are excreted in the urine. Patients with renal and/or liver disease may be at greater risk for adverse effects from antihistamines due to drug and metabolite accumulation. Therapy with antihistamines should be administered cautiously in such patients. Lower initial dosages may be appropriate.
Renal Dysfunction
Major:
lofexidine
Lofexidine has a major potential interaction with Renal Dysfunction.
Lofexidine can cause a decrease in blood pressure, a decrease in pulse, and syncope. It is recommended to monitor vital signs before dosing and for symptoms related to bradycardia and orthostasis. If clinically significant or symptomatic hypotension and/or bradycardia occur, the next dose of lofexidine should be reduced in amount, delayed, or skipped. Avoid using lofexidine in patients with severe coronary insufficiency, recent myocardial infarction, cerebrovascular disease, chronic renal failure, and in patients with marked bradycardia.
Moderate:
lofexidine
Lofexidine has a moderate potential interaction with Renal Dysfunction.
Renal impairment slows the elimination of lofexidine but exhibits less effect on the peak plasma concentration than on AUC values following a single dose. Dosage adjustments are recommended based on the degree of renal impairment. Only a negligible fraction of the lofexidine dose is removed during a typical dialysis session, so no additional dose needs to be administered after a dialysis session; therefore, the agent may be administered without regard to the timing of dialysis. Close monitoring is recommended when using this agent in patients with renal impairment.
Moderate:
lofexidine
Lofexidine has a moderate potential interaction with Renal Dysfunction.
Lofexidine prolongs the QT interval. Its use should be avoided in patients with congenital long QT syndrome. It is recommended to monitor ECG prior to and during treatment in patients with congestive heart failure, bradyarrhythmias, hepatic impairment, renal impairment, or patients taking other medicinal products that lead to QT prolongation (e.g., methadone). Electrolyte abnormalities must be corrected prior to initiating therapy.
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Renal Dysfunction.
Limited pharmacokinetic data are available for the older, first-generation antihistamines. Many appear to be primarily metabolized by the liver, and both parent drugs and metabolites are excreted in the urine. Patients with renal and/or liver disease may be at greater risk for adverse effects from antihistamines due to drug and metabolite accumulation. Therapy with antihistamines should be administered cautiously in such patients. Lower initial dosages may be appropriate.
Syncope
Major:
lofexidine
Lofexidine has a major potential interaction with Syncope.
Lofexidine can cause a decrease in blood pressure, a decrease in pulse, and syncope. It is recommended to monitor vital signs before dosing and for symptoms related to bradycardia and orthostasis. If clinically significant or symptomatic hypotension and/or bradycardia occur, the next dose of lofexidine should be reduced in amount, delayed, or skipped. Avoid using lofexidine in patients with severe coronary insufficiency, recent myocardial infarction, cerebrovascular disease, chronic renal failure, and in patients with marked bradycardia.
Urinary Retention
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast has a moderate potential interaction with Urinary Retention.
Some hypnotic drugs can have an anticholinergic effect and should be used with caution in patients with glaucoma, and trouble urinating due to retention or enlarged prostate.
Moderate:
Snooze Fast
The diphenhydrAMINE in Snooze Fast 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.
More resources
lofexidine
A total of 598 drugs are known to interact with lofexidine.
- Lofexidine is in the drug class antiadrenergic agents, centrally acting.
- Lofexidine is used to treat Opiate Withdrawal.
Snooze Fast
A total of 493 drugs are known to interact with Snooze Fast.
- Snooze fast is in the following drug classes: anticholinergic antiemetics, anticholinergic antiparkinson agents, antihistamines, miscellaneous anxiolytics, sedatives and hypnotics.
- Snooze fast is used to treat Insomnia.
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.