Gabapentin 40mg Tablets Availability
No, 40mg gabapentin tablets are not commercially available. 1
Available Formulations
According to the FDA-approved labeling, gabapentin (Neurontin) is available in the following oral tablet strengths 1:
- 600 mg tablets (scored, can be divided)
- 800 mg tablets (scored, can be divided)
Additional formulations include 1:
- Capsules: 100 mg, 300 mg, 400 mg
- Oral solution: Can be compounded
Alternative Dosing Options for Lower Doses
If a 40mg dose is needed, the following options are available:
Extemporaneous Oral Suspension
- Compounded suspensions can be prepared at 100 mg/mL concentration using commercially available gabapentin capsules 2
- These suspensions remain stable for 91 days at 4°C or 56 days at 25°C when stored in plastic prescription bottles 2
- The suspension can be prepared in either 1% methylcellulose in syrup (1:1) or equal volumes of Ora Plus/Ora Sweet 2
Capsule Options
- The 100 mg capsule is the lowest commercially available solid dosage form 1
- For doses below 100 mg, the capsule contents could theoretically be divided, though this is not an FDA-approved method and accuracy would be limited
Clinical Context
The evidence provided focuses primarily on chemotherapy-induced peripheral neuropathy (CIPN) treatment, where gabapentin is mentioned as a potential option despite limited evidence 3. In these contexts, typical dosing starts much higher than 40mg, with standard initial doses of 300 mg three times daily for adults 1.
For pediatric patients aged 3-11 years, dosing is weight-based at 10-15 mg/kg/day divided into three doses, which could result in individual doses in the 40mg range for very small children 1. In such cases, a compounded oral suspension would be the most appropriate formulation 2.