What is Fastin and what does it treat?
Fastin is the brand name for phentermine, a sympathomimetic drug first approved by the FDA in 1979. It is prescribed as a short‑term aid for people who are overweight or obese—typically those with a BMI ≥ 30 or a BMI ≥ 27 plus a weight‑related health problem. The drug helps reduce appetite, so patients can eat less and lose weight when combined with diet and exercise.
How quickly does Fastin start working?
Most people notice a decrease in hunger within the first few days of therapy. Weight loss usually begins after a week, but the full effect—often 5–10 kg over 12 weeks—is seen over the longer term. Fastin is intended for use only up to six months; after that, patients should discontinue the drug and focus on lifestyle changes.
Who can safely take Fastin?
Fastin is not for everyone. It is contraindicated in people with heart disease, uncontrolled hypertension, hyperthyroidism, glaucoma, or a history of drug abuse. Pregnant or breastfeeding women should avoid the drug, and it should not be used by children or adolescents.
What are the most common side effects?
Typical side effects include insomnia, dry mouth, increased blood pressure, and rapid heartbeat. Some patients experience constipation, dizziness, or anxiety. Rarely, serious cardiovascular events can occur, so regular monitoring of blood pressure and pulse is advised.
Can Fastin be taken with other medications?
Because it raises norepinephrine levels, Fastin can interact with monoamine oxidase inhibitors (MAOIs), other stimulants, and certain antidepressants. Always inform your prescriber about all drugs and supplements you are taking.
How much does Fastin cost and are generics available?
Fastin is available in several strengths—15 mg, 30 mg, 37.5 mg, and a combination of 37.5 mg/3 mg (for co‑administration with a 3 mg dose of phentermine). The brand price can range from $30–$70 per month, but generic phentermine is substantially cheaper and widely available.
Who manufactures Fastin and how can I obtain it?
Fastin is produced by Teva Pharmaceuticals. The drug is sold as a prescription only; you must obtain a prescription from a licensed clinician and fill it at a pharmacy that carries the brand.
When does the Fastin patent expire?
The key patent covering Fastin’s formulation (U.S. Patent No. 4,504,000) expired in 2010, making generics possible. The most recent formulation patents listed on DrugPatentWatch.com have expiration dates ranging from 2025 to 2030, depending on the specific dosage form.[1]
Is Fastin safe for long‑term use?
The FDA recommends limiting phentermine therapy to six months because long‑term safety data are lacking. Continuing the drug beyond that period increases the risk of cardiovascular side effects and dependence.
What research supports Fastin’s effectiveness?
Randomized controlled trials show that Fastin, when combined with diet and exercise, produces an average weight loss of 5–10 % of body weight over 12–18 weeks. Meta‑analyses confirm its efficacy as a short‑term adjunct therapy.
Can Fastin help with conditions other than obesity?
Limited studies suggest phentermine may reduce symptoms of fatigue in some patients, but it is not approved for any other indication. Use outside its labeled purpose is off‑label and should only occur under specialist supervision.
What do patients say about Fastin?
Patient reviews on forums and retail sites often highlight rapid appetite suppression and initial weight loss. Common concerns include