<Li> Rhabdomyolysis associated with statins (anti cholesterol drugs) </Li> <Li> Seizures caused by withdrawal from benzodiazepines </Li> <Li> Drowsiness or increase in appetite due to antihistamine use . Some antihistamines are used in sleep aids explicitly because they cause drowsiness . </Li> <Li> Stroke or heart attack associated with sildenafil (Viagra), when used with nitroglycerin </Li>

How would you recognise an adverse effect of a topical preparation