Can you take Mecamylamine with Primatene?
1 drug interaction and 22 additional warnings found for the following 2 drugs:
- mecamylamine
- Primatene (ephedrine/guaifenesin)
Drug interactions
Moderate drug interactions
Moderate:
ePHEDrine mecamylamine
Applies to: Primatene (ephedrine / guaifenesin) and mecamylamine
Using ePHEDrine together with mecamylamine may cause an increase in blood pressure.
Contact your doctor if your condition changes. If your doctor does prescribe these medications together, you may need a dose adjustment or need your blood pressure checked more often to safely use both medications.
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:
ePHEDrine Caffeine
Applies to: Primatene (ephedrine / guaifenesin)
Both ePHEDrine and caffeine can increase blood pressure and heart rate, and combining them may enhance these effects.
Talk to your doctor before using these medications, especially if you have a history of high blood pressure or heart disease. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications.
Contact your doctor if your condition changes or you experience increased side effects.
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
21 potential interactions Applies to: 20 conditions, including Benign Prostatic Hyperplasia, Diarrhea, Hyperthyroidism, Fever, and Psychosis.
Benign Prostatic Hyperplasia
Moderate:
Primatene
The ePHEDrine in Primatene has a moderate potential interaction with Benign Prostatic Hyperplasia.
Sympathomimetic agents may cause or worsen urinary difficulty in patients with prostate enlargement due to smooth muscle contraction in the bladder neck via stimulation of alpha-1 adrenergic receptors. Therapy with sympathomimetic agents should be administered cautiously in patients with hypertrophy or neoplasm of the prostate.
Bleeding Disorder
Moderate:
mecamylamine
Mecamylamine has a moderate potential interaction with Bleeding Disorder.
The action of mecamylamine may be potentiated by excessive heat, fever, infection, bleeding, vigorous exercise and salt depletion, as a result of diminished intake or increase excretion due to diarrhea, vomiting, excessive sweating or diuretics.
Cardiovascular Conditions and Disorders
Major:
Primatene
The ePHEDrine in Primatene has a major potential interaction with Cardiovascular Conditions and Disorders.
Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.
Cerebral Vascular Disorder
Major:
mecamylamine
Mecamylamine has a major potential interaction with Cerebral Vascular Disorder.
Cerebrovascular ischemia can occur as a result of marked hypotension during mecamylamine therapy. Therapy with mecamylamine should be administered cautiously in patients with or a history of cerebrovascular disorders.
Cerebrovascular Insufficiency
Major:
Primatene
The ePHEDrine in Primatene has a major potential interaction with Cerebrovascular Insufficiency.
Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.
Dehydration
Moderate:
mecamylamine
Mecamylamine has a moderate potential interaction with Dehydration.
The action of mecamylamine may be potentiated by excessive heat, fever, infection, bleeding, vigorous exercise and salt depletion, as a result of diminished intake or increase excretion due to diarrhea, vomiting, excessive sweating or diuretics.
Diabetes Mellitus
Moderate:
Primatene
The ePHEDrine in Primatene has a moderate potential interaction with Diabetes Mellitus.
Ephedrine may produce slight increases in blood glucose concentrations. Therapy with ephedrine should be administered cautiously in patients with diabetes mellitus. Closer monitoring of blood glucose concentrations may be appropriate. It is important that the recommended dosages of ephedrine are not exceeded.
Moderate:
Primatene
The ePHEDrine in Primatene has a moderate potential interaction with Diabetes Mellitus.
Sympathomimetic agents may cause increases in blood glucose concentrations. These effects are usually transient and slight but may be significant with dosages higher than those normally recommended. Therapy with sympathomimetic agents should be administered cautiously in patients with diabetes mellitus. Closer monitoring of blood glucose concentrations may be appropriate.
Diarrhea
Moderate:
mecamylamine
Mecamylamine has a moderate potential interaction with Diarrhea.
The action of mecamylamine may be potentiated by excessive heat, fever, infection, bleeding, vigorous exercise and salt depletion, as a result of diminished intake or increase excretion due to diarrhea, vomiting, excessive sweating or diuretics.
Fever
Moderate:
mecamylamine
Mecamylamine has a moderate potential interaction with Fever.
The action of mecamylamine may be potentiated by excessive heat, fever, infection, bleeding, vigorous exercise and salt depletion, as a result of diminished intake or increase excretion due to diarrhea, vomiting, excessive sweating or diuretics.
Glaucoma/Intraocular Hypertension
Major:
mecamylamine
Mecamylamine has a major potential interaction with Glaucoma/Intraocular Hypertension.
The use of mecamylamine is contraindicated in patients with glaucoma.
Hyperthyroidism
Major:
Primatene
The ePHEDrine in Primatene has a major potential interaction with Hyperthyroidism.
Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.
Ischemic Heart Disease
Major:
mecamylamine
Mecamylamine has a major potential interaction with Ischemic Heart Disease.
The use of mecamylamine is contraindicated in patients with coronary artery disease or insufficiency or a recent myocardial infarction. Mecamylamine blocks sympathetic ganglia causing vasodilation, increased peripheral blood flow, and decreased blood pressure.
Myoneural Disorder
Major:
mecamylamine
Mecamylamine has a major potential interaction with Myoneural Disorder.
CNS toxicity such as tremors, choreiform movements, altered mental status, and convulsions have occurred rarely. Patients with cerebral or renal impairment are at increased risk for mecamylamine- associated CNS toxicity. Therapy with mecamylamine should be administered cautiously in patients with or predisposition to neurological disorders. Clinical monitoring of neurological status and renal function (as indicated) is recommended.
Pheochromocytoma
Major:
Primatene
The ePHEDrine in Primatene has a major potential interaction with Pheochromocytoma.
Sympathomimetic agents may cause adverse cardiovascular effects, particularly when used in high dosages and/or in susceptible patients. In cardiac tissues, these agents may produce positive chronotropic and inotropic effects via stimulation of beta- 1 adrenergic receptors. Cardiac output, oxygen consumption, and the work of the heart may be increased. In the peripheral vasculature, vasoconstriction may occur via stimulation of alpha-1 adrenergic receptors. Palpitations, tachycardia, arrhythmia, hypertension, reflex bradycardia, coronary occlusion, cerebral vasculitis, myocardial infarction, cardiac arrest, and death have been reported. Some of these agents, particularly ephedra alkaloids (ephedrine, ma huang, phenylpropanolamine), may also predispose patients to hemorrhagic and ischemic stroke. Therapy with sympathomimetic agents should generally be avoided or administered cautiously in patients with sensitivity to sympathomimetic amines, hyperthyroidism, or underlying cardiovascular or cerebrovascular disorders. These agents should not be used in patients with severe coronary artery disease or severe/uncontrolled hypertension.
Prostate Tumor, Benign
Moderate:
Primatene
The ePHEDrine in Primatene has a moderate potential interaction with Prostate Tumor, Benign.
Sympathomimetic agents may cause or worsen urinary difficulty in patients with prostate enlargement due to smooth muscle contraction in the bladder neck via stimulation of alpha-1 adrenergic receptors. Therapy with sympathomimetic agents should be administered cautiously in patients with hypertrophy or neoplasm of the prostate.
Psychosis
Major:
mecamylamine
Mecamylamine has a major potential interaction with Psychosis.
CNS toxicity such as tremors, choreiform movements, altered mental status, and convulsions have occurred rarely. Patients with cerebral or renal impairment are at increased risk for mecamylamine- associated CNS toxicity. Therapy with mecamylamine should be administered cautiously in patients with or predisposition to neurological disorders. Clinical monitoring of neurological status and renal function (as indicated) is recommended.
Renal Dysfunction
Major:
mecamylamine
Mecamylamine has a major potential interaction with Renal Dysfunction.
Mecamylamine is primarily eliminated by the kidney, and it should be given with great discretion, if at all, when renal insufficiency is manifested by a rising or elevated BUN. This drug is contraindicated in uremia.
Urinary Retention
Major:
mecamylamine
Mecamylamine has a major potential interaction with Urinary Retention.
The parasympathetic blocking activity of mecamylamine can cause bladder atony and urinary retention. Therapy with mecamylamine should be administered cautiously in patients with urinary retention, prostatic hypertrophy, bladder neck obstruction, or urethral stricture.
Urinary Tract Obstruction
Moderate:
Primatene
The ePHEDrine in Primatene has a moderate potential interaction with Urinary Tract Obstruction.
Sympathomimetic agents such as ephedrine have the potential for producing clinically significant systemic effects, particularly during prolonged or indiscriminate use. In patients with prostate enlargement, urinary difficulty may develop or worsen due to smooth muscle contraction in the bladder neck via stimulation of alpha-1 adrenergic receptors. Therapy with ephedrine should be administered cautiously in patients with difficulty for urination due to hypertrophy or neoplasm of the prostate. It is important that the recommended dosages are not exceeded.
Vomiting
Moderate:
mecamylamine
Mecamylamine has a moderate potential interaction with Vomiting.
The action of mecamylamine may be potentiated by excessive heat, fever, infection, bleeding, vigorous exercise and salt depletion, as a result of diminished intake or increase excretion due to diarrhea, vomiting, excessive sweating or diuretics.
More resources
mecamylamine
A total of 166 drugs are known to interact with mecamylamine.
- Mecamylamine is in the drug class antiadrenergic agents, peripherally acting.
- Mecamylamine is used to treat High Blood Pressure.
Primatene
A total of 243 drugs are known to interact with Primatene.
- Primatene is in the drug class upper respiratory combinations.
- Primatene is used to treat Cold Symptoms.
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.