Side Effects
In general, phentermine is relatively well tolerated. The scientists had discovered that side effects produced by phentermine may include restlessness, nervousness, difficulty sleeping, dry mouth, tachycardia, and increased alertness, but the incidence and magnitude of these appear to be less than with the amphetamines. According to the fact that phentermine acts through sympathomimetic pathways, it can also increase the blood pressure and heart rate. Palpitations and insomnia may not be an exception as well. And, finally, for those people who, regardless to the numerous warnings, take phentermine on a long-term basis, phentermine may develop euphoria and a psychological addiction to it.
However, if mentioned above symptoms continue or are bothersome, immediately check with your doctor. In case you notice other effects of phentermine not listed above, please contact your doctor, nurse, or pharmacist.