Source: FDA, National Drug Code (US) Revision Year: 2022
QSYMIA extended-release capsules are comprised of immediate-release phentermine hydrochloride (expressed as the weight of the free base) and extended-release topiramate. QSYMIA contains phentermine hydrochloride, a sympathomimetic amine anorectic, and topiramate, a sulfamate-substituted monosaccharide.
The chemical name of phentermine hydrochloride is α,α-dimethylphenethylamine hydrochloride. The molecular formula is C10H15N ∙ HCl and its molecular weight is 185.7 (hydrochloride salt) or 149.2 (free base). Phentermine hydrochloride is a white, odorless, hygroscopic, crystalline powder that is soluble in water, methanol, and ethanol.
Its structural formula is:
Topiramate is 2,3:4,5-di-O-isopropylidene-β-D-fructopyranose sulfamate. The molecular formula is C12H21NO8S and its molecular weight is 339.4. Topiramate is a white to off-white crystalline powder with a bitter taste. It is freely soluble in methanol and acetone, sparingly soluble in pH 9 to pH 12 aqueous solutions and slightly soluble in pH 1 to pH 8 aqueous solutions.
Its structural formula is:
QSYMIA (phentermine and topiramate extended-release capsules) is for oral administration and available in four dosage strengths:
Each capsule contains the following inactive ingredients: FD&C Blue #1, FD&C Red #3, FD&C Yellow #5 and #6, ethylcellulose, gelatin, methylcellulose, microcrystalline cellulose, povidone, starch, sucrose, talc, titanium dioxide, and pharmaceutical black and white inks.
Dosage Forms and Strengths |
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QSYMIA extended-release capsules are available in four strengths (phentermine mg/topiramate mg):
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How Supplied | ||||||||||||||||||||||||||||||
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QSYMIA (phentermine and topiramate extended-release capsules) are available as follows (see Table 16): Table 16. QSYMIA Presentations:
Manufactured for VIVUS LLC by Catalent Pharma Solutions, LLC, 1100 Enterprise Drive, Winchester, KY 40391 |
Drug | Countries | |
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QSYMIA | United States |
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