Meclizine Pharmacology Podcast

Meclizine is classified as a first-generation antihistamine. I discuss meclizine pharmacology, adverse effects, drug interactions, and much more.

Meclizine is included on the Beers list due to its highly anticholinergic activity. Anticholinergic effects include constipation, dry eyes, dry mouth, urinary retention, and confusion.

Sedation is an important adverse effect of meclizine. This adverse effect can be increased when used with other sedating medications such as opioids and benzodiazepines.

Meclizine is primarily used for vertigo and motion sickness in clinical practice. The usual starting dose ranges between 12.5 to 25 mg.

Meclizine is partially broken down by CYP2D6 so medications like bupropion can inhibit the breakdown of meclizine and lead to higher concentrations.

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