Drug interactions
Mecamylamine + Niacin
Severity: Moderate
Mecamylamine and Niacin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Mecamylamine is a ganglionic blocker that lowers blood pressure, and niacin causes vasodilation with flushing. Used together they may add to hypotension, particularly orthostatic hypotension. The effect is usually modest at niacin doses used for lipid lowering.
What this interaction means in plain words
Mecamylamine and Niacin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Mecamylamine belongs to Cardiovascular; Niacin belongs to Cardiovascular.
Why it happens
Additive hypotensive effects from ganglionic blockade (mecamylamine) and niacin-induced vasodilation.
What to do
Monitor blood pressure, especially standing blood pressure, when starting or increasing niacin. Counsel patients to rise slowly and reduce the dose of either drug if symptomatic hypotension occurs.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Niacin
- Alogliptin-metformin + Niacin Moderate
- Atorvastatin + Niacin Moderate
- Canagliflozin-metformin + Niacin Moderate
- Cholestyramine + Niacin Moderate
- Colestipol + Niacin Moderate
- Dapagliflozin-metformin + Niacin Moderate
Other interactions of Mecamylamine
- Lofexidine + Mecamylamine Major
- Bethanechol + Mecamylamine Moderate
- Mecamylamine + Tizanidine Moderate
- Mecamylamine + Vitamin b3 Moderate
Frequently asked questions
Can I take Mecamylamine with Niacin?
MediHelp rates the interaction as moderate. Mecamylamine and Niacin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Mecamylamine is a ganglionic blocker that lowers blood pressure, and niacin causes vasodilation with flushing. Used together they may add to hypotension, particularly orthostatic hypotension. The effect is usually modest at niacin doses used for lipid lowering.
How serious is the interaction between Mecamylamine and Niacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, especially standing blood pressure, when starting or increasing niacin. Counsel patients to rise slowly and reduce the dose of either drug if symptomatic hypotension occurs.
What other medicines interact with Niacin?
MediHelp also lists interactions of Niacin with, for example, Alogliptin-metformin, Atorvastatin, Canagliflozin-metformin. The full list is on the Niacin page.
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