This common over-the-counter drug could be linked to dementia - Antihistamines used to aid sleep and relieve nasty allergy ...

Diphenhydramine is the active ingredient in countless over-the-counter medications. But experts say there are serious risks ...

UTIs are among the most common infections worldwide, affecting some 15 million women a year. Phenazopyridine, sold under brand names such as Azo and Uristat, is used to treat the pain, burning and ...

Many people rely on over-the-counter painkillers for everyday ailments, but the NHS has warned that some drugs should not be ...