Phentermine hydrochloride, along with fenfluramine, are active ingredient in phentermine pills, which suppress appetite. The combination activates neurotransmitters in your brain that tell you to stop eating because you're full.

Phentermine pills, when taken without supervision may result in severe complications, such as the destruction of the pulmonary valve.

Along with phentermine hydrochloride, small amounts of ethyl, n-butyl and isopropyl alcohol, F D & C Blue 1 Aluminum Lake and Propylene Glycol are present in the capsules as well as modified Pharmaceutical Shellac or food grade Refined Shellac. Even though phentermine hydrochloride has many brand names, and even more generic versions, the most popular brand is Adipex-P.

Phentermine pills can work immediately or via daily time release, depending on the phentermine hydrochloride present in the pills. Adipex-P is an instant action capsule while Ionamin is a slow acting pill. However, both versions produce similar results and are preferred based on the patient's medical history and the doctor's discretion.

Phentermine hydrochloride should be combined with proper diet, good sleeping habits and exercise in order to be effective.

Excess dosage or long-term usage may result in unforeseen complications. Consult your physician regarding dosage for effective results. Self-medication of phentermine is not advised.

Also be aware of the herbal versions of phentermine. They are believed by many to be superior to the prescribed, synthetic versions of the drug, because of its higher ability to suppress appetite, and because ""herbal"" is seen as a more natural version. These herbal versions of phentermine usually do not require prescriptions, but consult your doctor either way, since a chemical is a chemical.