Famotidine

Famotidine is a non-sedating antihistamine that blocks the H2 histamine receptor. Famotidine is available over the counter and on perscription and is used to treat and prevent ulcers, gastroesophageal reflux disease (GERD) and other conditions that cause heartburn.

Famotidine brand names include Pepcid and Zantac 360 (not to be confused with Zantac, which contains different active ingredients).

Long COVID
Famotidine has limited evidence for use in Long COVID patients from a small observational study by Glynne et al. (2022), in which H1 and H2 blockers were used together.

Costs and availability
Available over the counter or on perscription.

Notable studies

 * 2022, Long COVID following mild SARS-CoV-2 infection: characteristic T cell alterations and response to antihistamines - (Full text)

Learn more

 * Famotidine - DrugBank Online
 * Famotidine - drugs.com
 * Famotidine - WebMD