Neurontin (Gabapentin) Drug Information: Description, User Reviews, Drug Side Effects, Interactions

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February 3, 2012

Neurontin

Sleep Disorder Drugs »

Sleep disorder drugs (hypnotic and sedative drugs) overview

Insomnia, a disorder of sleep, occurs occasionally in most people but usually lasts only a few days. The body then "corrects" itself naturally, and people return to a normal pattern of sleep. Insomnia may be short-term (less than three weeks) or chronic, lasting longer than three weeks. Contributing factors include, but are not limited to, poor sleeping habits, stress, jet lag, medications, disease, and depression. Chronic insomnia may warrant the use of sedative/hypnotics medications; however, it is important that the treating physician perform a complete diagnostic evaluation as well as take medication and substance abuse histories, to exclude secondary insomnia due to other conditions.

Hypnotics/sedatives medications (henceforth referred to as hypnotics) work, in general, by increasing the activity of gamma-aminobutyric acid (GABA), a neurotransmitter in the brain. Neuro...

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Neurontin

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Neurontin®
(gabapentin) Capsules

Neurontin®
(gabapentin) Tablets

Neurontin®
(gabapentin) Oral Solution

DRUG DESCRIPTION

Neurontin® (gabapentin) Capsules, Neurontin (gabapentin) Tablets, and Neurontin (gabapentin) Oral Solution are supplied as imprinted hard shell capsules containing 100 mg, 300 mg, and 400 mg of gabapentin, elliptical film-coated tablets containing 600 mg and 800 mg of gabapentin or an oral solution containing 250 mg/5 mL of gabapentin.

The inactive ingredients for the capsules are lactose, cornstarch, and talc. The 100 mg capsule shell contains gelatin and titanium dioxide. The 300 mg capsule shell contains gelatin, titanium dioxide, and yellow iron oxide. The 400 mg capsule shell contains gelatin, red iron oxide, titanium dioxide, and yellow iron oxide. The imprinting ink contains FD&C Blue No. 2 and titanium dioxide.

The inactive ingredients for the tablets are poloxamer 407, copolyvidonum, cornstarch, magnesium stearate, hydroxypropyl cellulose, talc, candelilla wax and purified water.

The inactive ingredients for the oral solution are glycerin, xylitol, purified water and artificial cool strawberry anise flavor.

Gabapentin is described as l-(aminomethyl)cyclohexaneacetic acid with a molecular formula of C₉H₁₇NO₂ and a molecular weight of 171.24. The structural formula of gabapentin is:

Neurontin®
(gabapentin) Capsules Structural Formula Illustration

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.

What are the possible side effects of gabapentin (Gabarone, Neurontin)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; fever; swollen glands; painful sores in or around your eyes or mouth; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any new or worsening symptoms such as: mood or behavior changes, depression, anxiety, or if you feel agitated, hostile, restless, hyperactive (mentally or physically), or have thoughts about suicide or hurting yourself.

Call your doctor at once if you have any...

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What are the precautions when taking gabapentin (Neurontin)?

Before taking gabapentin, tell your doctor or pharmacist if you are allergic to it; or to gabapentin enacarbil; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, mental/mood problems (such as depression, thoughts of suicide).

This drug may make you dizzy or drowsy or cause blurred vision. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely. Limit alcoholic beverages.

Before having surgery, tell your doctor or dentist about all the...

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Last reviewed on RxList: 8/22/2011
This monograph has been modified to include the generic and brand name in many instances.