Can vitamin B12 be taken for sciatica?
Generally, patients with sciatica can take vitamin B12, which may provide some therapeutic benefit. A detailed explanation follows:

Sciatica is primarily caused by nerve compression due to various underlying conditions; the most common clinical cause is lumbar disc herniation. Vitamin B12 is a neurotrophic agent that helps alleviate symptoms such as numbness and swelling and promotes nerve repair. Therefore, under medical guidance, patients with sciatica may take vitamin B12 to help improve their symptoms. Additionally, traditional Chinese medicine (TCM) therapies—including acupuncture, massage, and heat application—may also be considered to relieve symptoms. When necessary, patients may, per physician recommendation, take other medications to manage symptoms; commonly used options include Gen Tong Ping Granules, Yao Tong Ning Capsules, and sustained-release ibuprofen capsules.
In daily life, patients should prioritize bed rest on a firm mattress, avoid bending over or lifting heavy objects, prevent lumbar injury, maintain adequate warmth, and strictly avoid strenuous physical activity and excessive fatigue.