Antibiotics can cause side effects, including digestive symptoms, and some people have allergic reactions. Tell the prescriber or pharmacist about suspected reactions and other medicines you take. This article concerns antibiotics, rather than side effects of every medicine. Severe tongue or throat swelling, breathing difficulty or collapse may indicate a serious allergic reaction and requires immediate emergency care. Do not wait for an online reply or a reporting form. A professional must advise on the individual reaction and treatment; this overview cannot decide whether to stop, restart or replace a prescription. After immediate care, ask about reporting a suspected medicine reaction through NAFDAC's current safety-reporting arrangements in Nigeria.