Less common Phentermine side effects may include :
Difficult or painful urination, decreased sexual desire, fast or irregular heartbeat; paranoia, hallucinations (feeling, seeing, or hearing things that are not there), severe headaches, mental depression or elation, irritable bowel, skin rash or hives, dry mouth, overexcitement.
Contact your doctor immediately :
if you experience weakness, chest pain, shortness of breath, fainting, or swelling of the feet. These side effects are rare, but may indicate a serious reaction to
Phentermine. Tremor, convulsions, vomiting, or nausea may indicate an overdose or withdrawal, and should also be reported immediately.