What Is Phentermine?

Potential Side Effects

Patients who take phentermine could experience a range of potential side effects. Some of the most frequently reported side effects include an elevated heart rate, a tingling or pricking sensation in the hands or feet, constipation, and dry mouth. Many individuals taking this medicine have experienced difficulty with falling asleep or staying asleep, and it is common to feel nervous while using the drug too. Headaches, dizziness, and itching may occur, and patients might develop diarrhea or stomach pain. Some individuals have noticed an unpleasant taste in the mouth during treatment with phentermine, and the patient's interest in sex may increase or decrease. Although rare, phentermine may cause serious side effects for some patients. For example, patients could start to have auditory or visual hallucinations, and they may experience severe changes in their mental state.

Chest pain could occur, and patients should let their doctor know immediately if they experience this symptom. Urgent medical care is necessary if side effects such as shortness of breath, pounding heartbeats, a fluttering sensation in the chest, or tremors occur. This medication can increase blood pressure, and patients could experience nosebleeds, blurry vision, anxiety, or a severe headache if blood pressure increases dramatically. If any of these symptoms develop, the patient should seek emergency care.

Read more to learn about the precautions to remember when taking phentermine next.