Appetite suppressants work by affecting the part of your brain that controls hunger. This sends your body the message that you're full, even if you only eat a small amount of food. It also helps you control cravings. Although the prospect of a pill controlling your appetite may sound appealing, appetite suppressants are not as effective as you might hope. You will still need to rely on your willpower to get you through a weight-loss program.
Side Effects
Most appetite suppressants -- prescription or over the counter -- cause side effects. The intensity and the type of reaction depend on the person, so it's important to monitor any signs and report them to your doctor immediately. A common side effect of appetite suppressants is dry mouth. People may experience gastrointestinal discomfort, insomnia or headaches.
Serious Problems May Develop
While most side effects are mild, the chance is present for more serious problems to develop. Appetite suppressants may include stimulants, which can cause rapid heartbeat, high blood pressure and anxiety. Although rare, chest pain and fainting are also possible.
Addiction Potential
Prescription appetite suppressants such as phentermine, phendimetrazine and diethylpropion may be addictive. They are meant to be taken only for short periods of time -- usually up to 12 weeks. Taking them for longer may result in serious problems, including mood changes and mental illness. Once you give them up, you might experience withdrawal symptoms that include depression, nausea, weakness and trouble sleeping.
Potentially Unsafe
If you're buying appetite suppressants over the counter, you're buying pills that haven't been properly studied or put through safety tests. According to MayoClinic.com, most of the over-the-counter weight-loss pills are either ineffective or potentially unsafe, depending on how long they've been around. Chromium, for example, is likely safe; however, no studies have been done to prove whether it works.
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