R 637 Pill — GRAY OVAL, 19mm — Gabapentin

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Imprint	R / 637
Colour	GRAY
Shape	OVAL
Size	19
Strength	GABAPENTIN 800 mg
Dosage form	Tablet, Film Coated
Manufacturer	PD-Rx Pharmaceuticals, Inc.
NDC	43063-271
Schedule	—
Availability	—
Ingredients	GABAPENTIN[GABAPENTIN]

What does this imprint mean?

The imprint "R 637" is a code stamped or printed on the tablet or capsule by the manufacturer, used to identify the drug, its strength and the maker.

Active ingredient

Gabapentin

Uses and warnings

Major Warnings: - Suicidal Behavior: AEDs including gabapentin approximately double the risk of suicidal thoughts/behavior, affecting about 1 in 500 patients. Early warning signs require immediate healthcare provider notification. - Pediatric Neuropsychiatric Effects: In children 3-12 years, gabapentin causes emotional lability (6%), hostility (5.2%), hyperkinesia (4.7%), and thought disorder (1.7%). - Withdrawal Risk: Abrupt discontinuation can cause severe seizures. Gradual tapering over minimum 1 week is required. - Hypersensitivity Reaction: Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) reported, presenting with fever, rash, and lymphadenopathy. ---

Gabapentin treats two main conditions: Postherpetic Neuralgia: "Gabapentin is indicated for the management of postherpetic neuralgia in adults." Epilepsy: The medication serves as "adjunctive therapy in the treatment of partial seizures" in patients over 12 years and in pediatric patients ages 3-12 years. ---

Read the full drug profile →

How to identify this pill

• Check the imprint matches exactly: "R 637".
• Confirm the colour (GRAY) and shape (OVAL).
• Compare the size (19) against a ruler if possible.
• When in doubt, confirm with a pharmacist before taking any medication.

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