Thiamine Dosing for Peripheral Neuropathy From Thiamine Deficiency
A single “recommended dose of vitamin B1 for resolution of peripheral neuropathy” is not available because thiamine repletion is indicated for thiamine-deficiency (beriberi) neuropathy, rather than for all peripheral neuropathy etiologies. [1]
Treatment Goals
Treatment aims to replenish thiamine stores and improve neuropathic symptoms after confirmation or strong suspicion of thiamine deficiency. [1]
Thiamine Dosing Regimens (Adults)
Moderate or Advanced Thiamine-Deficiency Neuropathy
- 20–30 mg thiamine per day orally for several weeks after symptoms disappear is recommended for moderate or advanced neuropathy. [2]
Severe Thiamine Deficiency (Including Peripheral Neuropathy)
- 50–100 mg thiamine intravenously initially is recommended for severe deficiency in adults. [1]
- After initial repletion, 10 mg thiamine intramuscularly daily for ~1 week is recommended. [1]
- After parenteral repletion, 3–5 mg thiamine orally daily for at least 6 weeks is recommended. [1]
Mild Thiamine Deficiency
- 10 mg thiamine orally daily for 1 week, followed by 3–5 mg/day orally for at least 6 weeks is recommended for mild thiamine deficiency. [1]
Key Practical Considerations
- Peripheral neuropathy from thiamine deficiency is addressed with thiamine replacement dosing above, but symptom improvement typically requires ongoing treatment over weeks rather than a single short course. [2]