Cautions
Never exceed the recommended dose and never take phentermine for longer than you are instructed without checking with your doctor. These both factors may cause serious side effects. Do not forget to keep all doctor or laboratory appointments while you are using phentermine. If you plan to begin taking any new medicine after the phentermine, either prescription or over-the-counter, you should definitely check with your doctor or pharmacist.
Avoid driving, operating machinery, or doing anything else that may be dangerous until you understand how you react to phentermine. Remember that if you are going to have any medical or dental treatments, emergency care, or surgery, tell the doctor or dentist that you are using phentermine.