Phentermine is a FDA approved substance to control appetite since 1959. FDA approved means that it is one of the most powerful appetite suppressants in the market that is still considered safe to use and well tolerated. Many research and clinical studies have proven this to be an effective weight loss substance when accompanied with diet and exercise. It is recommended for the consumer to closely monitor any possible side effects during the first few days of use.
Studies have shown that phentermine causes a 10-15 % greater weight loss compared to a placebo in a double-blind study. Like most diet pills, its effectiveness will be greatest if accompanied by proper diet and exercise. It is most effective if taken once a day during a 3-4 week period.
It is best to take phentermine before 3pm due to the risk of insomnia. It is recommended to take phentermine on an empty stomach, usually before breakfast or 1-2 hours after breakfast.