Is Meclizine legal in the United Kingdom?

An over-the-counter travel sickness pill that extended male mouse lifespan in one cohort, and did nothing when the same programme retested it at a different dose.

Meclizine is the drug people buy for travel sickness, and it is on this site because the National Institute on Aging tested it for lifespan and it worked, once. In the 2024 cohort it extended lifespan in male mice started at 12 months of age, with 90th percentile lifespan extended by 6 percent in absolute terms, not significant on the formal maximal lifespan test.

Mechanism: A first-generation H1 antihistamine with anticholinergic activity, which is how it works for motion sickness, by damping vestibular signalling. Its ageing rationale is unrelated: it was identified as shifting cellular metabolism away from oxidative phosphorylation toward glycolysis, apparently by interfering with the Kennedy pathway of phosphatidylethanolamine synthesis, which reduces mitochondrial respiration.

Regulatory history: Available over the counter and by prescription for motion sickness and vertigo. Not approved for any ageing indication.

Licenses medicines for the UK market. A compound without a marketing authorisation is an unlicensed medicine, which can only lawfully be supplied for human use through a prescriber under the specials scheme, not sold as a research product.

The classification above is the The Longevity Archive reading of Medicines and Healthcare products Regulatory Agency listings for Meclizine at the reviewed date, not a legal opinion. Rules change, and importing, prescribing and possessing a compound can each be treated differently. Check the regulator directly before acting on anything here.