SPL Set ID: 3ad96553-73a4-4a9b-8a89-10a29b794ed3
1 drug(s) with this SPL Set ID
The active ingredient in gabapentin capsules, USP is gabapentin, which has the chemical name 1-(aminomethyl) cyclohexaneacetic acid. The molecular formula of gabapentin is C 9 H 17 NO 2 and the molecular weight is 171.24. The structural formula of gabapentin is: Gabapentin is a white to off-white crystalline solid with a pK a1 of 3.7 and a pK a2 of 10.7. It is freely soluble in water and both basic and acidic aqueous solutions. The log of the partition coefficient (n-octanol/0.05M phosphate buffer) at pH 7.4 is -1.25. Each gabapentin capsule, USP contains 100 mg, 300 mg, or 400 mg of gabapentin and the following inactive ingredients: corn starch, D&C red 33 (300 mg only), D&C yellow 10 (300 mg only), ferric oxide red (400 mg only), ferric oxide yellow (400 mg only), ferrosoferric oxide, gelatin, lactose monohydrate, potassium hydroxide, propylene glycol, sodium lauryl sulfate, shellac, talc, and titanium dioxide. Chemical Structure