Among people given phentermine to lose weight, 84% (81 out of 97) responded, while 16% (16 out of 97) did not according to a new study.

People without diabetes given 30 or 37 mg of phentermine lost an average of 23 lbs in 6 months according to a new study.

Systolic blood pressure dropped by an average of 6 mm Hg.

Phentermine causes an average weight loss of 16 lbs in people with HbA1c less than 6% according to a new study.

(HbA1c is the 3 month average blood sugar levels.)

Phentermine causes an average weight loss of 7 lbs in people with HbA1c of 6% to 6.5% according to a new study.

(HbA1c is the 3 month average blood sugar levels.)

Phentermine causes an average weight loss of 9 lbs in people with HbA1c of more than 6.5% according to a new study.

(HbA1c is the 3 month average blood sugar levels.)

• paresthesia (tingling or pricking of a person's skin, a feeling of "pins and needles"


• dry mouth


• constipation


• altered taste (dysgeusia), and


• insomnia.

• Paraesthesia (tingling, pricking, or numbness of the skin) in 21% vs 14% vs 2%


• Dry Mouth in 21% vs 13% vs 2%


• Constipation in 17% vs 6% vs 5%


• Insomnia in 10% vs 7% vs 3%


• Dizziness in 10% vs 7% vs 3%


• Dysgeusia (altered taste) in 10% vs 7% vs 1%

• 22 lbs weight loss with phentermine alone


• 18.5 lbs weight loss with phentermine plus fenfluramine (Fen-Phen)


• 16.5 lbs with fenfluramine alone


• 9.7 lbs in those given a placebo.