Drug Facts
Composition & Profile
Identifiers & Packaging
16.1 How Supplied Tablets Meclizine hydrochloride 12.5 mg tablets are oval shaped, biconvex, two-layered tablet, one blue to pale blue layer debossed with “34” and one white to off white layer debossed with “L”. Bottles of 100 Bottles of 500 Meclizine hydrochloride 25 mg tablets are oval shaped, biconvex, two-layered tablet, one yellow to pale yellow layer debossed with “49” and one white to off white layer debossed with “L”. Bottles of 100 Bottles of 1000 Meclizine hydrochloride 50 mg tablets are oval shaped, biconvex, two-layered tablet, one blue to pale blue layer debossed with “50” and one yellow to pale yellow layer and debossed with “L”. Bottles of 100 Chewable Tablets Meclizine hydrochloride 25 mg chewable tablets are pink colored round tablets debossed with “M 25” on one side and break line on other side. Bottles of 100 16.2 Storage and Handling Store at 20oC to 25oC (68oF to 77oF) [See USP Controlled Room Temperature]. Dispense in a tight, light-resistant container (USP).; hi; hjhiyui
- 16.1 How Supplied Tablets Meclizine hydrochloride 12.5 mg tablets are oval shaped, biconvex, two-layered tablet, one blue to pale blue layer debossed with “34” and one white to off white layer debossed with “L”. Bottles of 100 Bottles of 500 Meclizine hydrochloride 25 mg tablets are oval shaped, biconvex, two-layered tablet, one yellow to pale yellow layer debossed with “49” and one white to off white layer debossed with “L”. Bottles of 100 Bottles of 1000 Meclizine hydrochloride 50 mg tablets are oval shaped, biconvex, two-layered tablet, one blue to pale blue layer debossed with “50” and one yellow to pale yellow layer and debossed with “L”. Bottles of 100 Chewable Tablets Meclizine hydrochloride 25 mg chewable tablets are pink colored round tablets debossed with “M 25” on one side and break line on other side. Bottles of 100 16.2 Storage and Handling Store at 20oC to 25oC (68oF to 77oF) [See USP Controlled Room Temperature]. Dispense in a tight, light-resistant container (USP).
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Overview
Meclizine hydrochloride, a histamine (H1) receptor antagonist, is a white or slightly yellowish, crystalline powder. It has the following structural formula: struct-1 Chemically, meclizine hydrochloride is 1-(p-chloro-α-phenylbenzyl)-4-(m-methylbenzyl) piperazine dihydrochloride monohydrate. Tablets Inactive ingredients for the tablets are: corn starch; dibasic calcium phosphate; magnesium stearate; polyethylene glycol; sucrose. The 12.5 mg tablets also contain: FD&C Blue # 1. The 25 mg tablets also contain: FD&C Yellow # 6 and D&C Yellow # 10. The 50 mg tablets also contain: FD&C Blue # 1, FD&C Yellow # 6 and D&C Yellow # 10. Each meclizine hydrochloride 12.5 mg tablet contains 12.5 mg of meclizine dihydrochloride equivalent to 10.53 mg of meclizine free base. Each meclizine hydrochloride 25 mg tablet contains 25 mg of meclizine dihydrochloride equivalent to 21.07 mg of meclizine free base. Each meclizine hydrochloride 50 mg tablet contains 50 mg of meclizine dihydrochloride equivalent to 42.14 mg of meclizine free base. Chewable Tablets Inactive ingredients for the chewable tablets are: corn starch, colloidal silicon dioxide, FD&C Red # 40, lactose monohydrate, magnesium stearate, raspberry flavor, saccharin sodium, and talc. Each meclizine hydrochloride 25 mg chewable tablet contains 25 mg of meclizine dihydrochloride equivalent to 21.07 mg of meclizine free base.
Indications & Usage
Meclizine hydrochloride is indicated for the treatment of vertigo associated with diseases affecting the vestibular system in adults.
Dosage & Administration
1 Recommended Dosage The recommended dosage is 25 mg to 100 mg daily administered orally, in divided doses, depending upon clinical response. 2.2 Administration Instructions Tablets Meclizine hydrochloride tablets must be swallowed whole. Chewable Tablets Meclizine hydrochloride chewable tablets must be chewed or crushed completely before swallowing. Do not swallow chewable tablets whole.
Warnings & Precautions
1 Drowsiness Since drowsiness may occur with use of meclizine hydrochloride, patients should be warned of this possibility and cautioned against driving a car or operating dangerous machinery. Patients should avoid alcoholic beverages while taking meclizine hydrochloride [see DRUG INTERACTIONS (7.1)]. 5.2 Concurrent Medical Conditions Because of its potential anticholinergic action, meclizine hydrochloride should be used with caution in patients with asthma, glaucoma, or enlargement of the prostate gland.
Contraindications
Meclizine hydrochloride is contraindicated in patients with a hypersensitivity to meclizine or any of the inactive ingredients [see ADVERSE REACTIONS (6) and DESCRIPTION (11)].
Adverse Reactions
The following adverse reactions associated with the use of meclizine hydrochloride were identified in clinical studies or postmarketing reports. Because some of these reactions were reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Anaphylactic reaction, drowsiness, dry mouth, headache, fatigue, and vomiting. On rare occasions blurred vision has been reported.
Drug Interactions
1 CNS Depressants There may be increased CNS depression when meclizine hydrochloride is administered concurrently with other CNS depressants, including alcohol [see WARNINGS AND PRECAUTIONS (5.1)]. 7.2 CYP2D6 Inhibitors Based on in-vitro evaluation, meclizine is metabolized by CYP2D6. Therefore, there is a possibility for a drug interaction between meclizine hydrochloride and CYP2D6 inhibitors. Therefore, monitor for adverse reactions and clinical effect accordingly.
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