The authors concluded that phentermine is safe and effective for longer-term use—that is, >3 months—for weight loss in low-risk individuals.
Can you take phentermine for a year?
By contrast, when the FDA approved a new brand-named combination medication, Phentermine/Topiramate-CR (Qsymia), in 2012, it was for long-term use for a year or more. Many doctors prescribe phentermine, on its own, to patients for more than 12 weeks.
What is the longest time you can take phentermine?
Take phentermine exactly as directed. Most people takephentermine for 3 to 6 weeks; the length of treatment depends on how you respond to the medication. Phentermine can be habit-forming. Do not take a larger dose, take it more often, or take it for a longer period than your doctor tells you to.
What happens with long-term use of phentermine?
Physical and psychological dependence may occur with the long-term use of phentermine. A withdrawal reaction, which includes excessive drowsiness, fatigue, tremors and depression may occur after prolonged use.
Is phentermine FDA approved for long-term use?
Drugs with an FDA-approved indication for obesity. Only orlistat, lorcaserin, and phentermine/topiramate-ER are FDA-approved for long-term use; the others are approved only for short-term use (i.e., a few weeks).
Can you lose 20 pounds in a month on phentermine?
Several clinical studies have proven that phentermine can boost fat loss. The expected average weight loss with phentermine use is 5% of your initial body weight. Yet, over 12 weeks, it can be as high as 10%. This equates to a weight loss of 10–20 pounds (4.5–9 kg) for a 200 pound (90.7 kg) person ( 8 ).
Can you take phentermine every other day and still lose weight?
We suggest for those women trying to lose 25 lbs or less, you start weaning off the phentermine after the second month. Take the pill every other day for two weeks, then every third day, until you are down to 1 pill a week (usually Sunday) then stop completely.
What drug is similar to phentermine?
The FDA has approved five of these drugs—orlistat (Xenical, Alli), phentermine-topiramate (Qsymia), naltrexone-bupropion (Contrave), liraglutide (Saxenda), and semaglutide (Wegovy)—for long-term use.
Why is phentermine bad for you?
Phentermine may cause a serious increase in your blood pressure. This may make your heart work harder. The extra stress on your heart may make your heart disease worse. For people with history of hyperthyroidism: Tell your doctor if you have hyperthyroidism (an overactive thyroid).
What is an alternative to phentermine?
Contrave (naltrexone/bupropion) and phentermine are two medications that are used with a reduced-calorie diet and exercise regimen to aid in weight loss. Although both medications have similar effectiveness, they work in different ways.
Can phentermine affect your kidneys?
Phentermine can cause elevation of the blood pressure and this can hasten the deterioration of kidney function.
Can phentermine cause liver damage?
No instances of acute liver failure or chronic liver injury have been linked to phentermine/topiramate, but it has had limited general clinical use. References on the hepatotoxicity and safety of phentermine and topiramate separately are given in the sections on the individual agents.
What happens when you stop taking phentermine?
Behavioural symptoms can also occur during diet pill withdrawal. You may not seem like yourself after you abruptly stop taking the pills. You may experience nervousness, anxiety and irritability. Depression can also set in, accompanied by fatigue and insomnia.