Tagamet (Cimetidine

Tagamet is an H2 antihistamine that has immunomodulatory properties: it boosts NK cell activity, and reduces T-regs (doing the latter may not be a good idea in autoimmunity or in those with organ transplants).

Tagamet is a known testicular toxicant, but vitamin B12 helps mitigate this damage. Ref: 1. Tagamet has a lot of interactions with other drugs, so you may like to consult a drug interactions checker to check if it interacts with any drugs you are taking.

•ME/CFS patient (faith.hope.love) — took Tagamet 200 mg every other day, and was able to go back to work