Phentermine is a drug formulated to help patients lose weight. Its action works to lower appetite. Phentermine typically enables patients to decrease their weight when used in combination with exercise and a healthy diet. The treatment regimen usually lasts for three to six weeks, per the National Institutes of Health (NIH). It is crucial to take this drug exactly as prescribed; misuse of the drug may lead to addiction. Take Phentermine with meals to help limit side effects.
Gastrointestinal Problems
Phentermine may cause stomach upset, vomiting, and diarrhea or constipation, reports the NIH. These symptoms may be ongoing or sporadic, and may lead to dehydration.
Foul Taste and Dry Mouth
Phentermine use may cause "cotton" mouth, where the mouth feels very dry. Users may also develop a foul taste.
Dependence
Abuse of Phentermine may lead to "psychological dependence and severe social dysfunction," according to Drugs.com. Abuse of this drug may lead to sleep problems, hyperactive behavior and personality disorders such as psychosis.
Cardiac Disorders
Heart palpitations and chest pain may occur with Phentermine treatment. Cardiac-related swelling and edema (fluid build up) of the lower extremities may also occur. Tachycardia and cardiac valvular disease may also occur with Phentermine use.
Problems Exercising
An inability to exercise at normal levels of exertion may occur while undergoing Phentermine treatment. An exercise log may be helpful to track the symptoms related to problems with exercise.
Elevated Blood Pressure
The use of Phentermine may cause blood pressure to increase. This may lead to feelings of dizziness.
Loss of Libido
A decrease in sexual desire and impotence may occur with Phentermine treatment. Loss of libido may be ongoing or occur only sporadically.
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