- mental health conditions such as depression, mania , bipolar disorder or schizophrenia
- Heart conditions (e.g. angina, chest pain, heart failure, irregular heart beats, heart attack or narrowing of any heart valve)
- a history of bleeding or blood clotting problems
- a history of glaucoma
- kidney problems
- prostate problems
- epilepsy
- recurrent fainting
- moderate or severe liver problems
- any serious medical condition which may require immediate hospitalisation