This medication has been prescribed because your doctor believes the benefit to you outweighs the risk of side effects. There are few serious side effects associated with this medication. There is a possibility that this medication will raise your blood pressure. Tell your doctor if your blood pressure is high on a regular basis. If you experience any noticeable serious side effects, then you should speak with your doctor right away. It is also possible, though unlikely, to experience an allergic reaction to Phentermine, contact your doctor if you do so. As a Schedule IV drug, Phentermine has a potential for abuse, albeit a low one. The 7 common side effects of Phentermine include increased heart rate, dry mouth, tingling or prickling in the hands or feet, sleeplessness, constipation, nervousness, and carry potential withdrawal effects when abruptly stopped such as insomnia and depression. Even though Phentermine is one of the most commonly prescribed weight-loss medications, it is not recommended for people with heart disease, high blood pressure, an overactive thyroid gland, or glaucoma. Women who are pregnant, may become pregnant, or are breastfeeding should not take it. Phentermine treatment is available at Island Medical & Beauty Clinic. We serve patients from Honolulu HI, Aiea HI, Pearl City HI, Halawa HI, and Village Park HI.