- Related Diseases
- Images & Quizzes
- Habits That Can Help You Lose Weight Slideshow
- Lose Weight Without Dieting Slideshow
- Surprising Sources of Hidden Sugar Slideshow
- What is phentermine?
- What brand names are available for phentermine?
- Is phentermine available as a generic drug?
- Do I need a prescription for phentermine?
- Why is phentermine prescribed to patients?
- What are the side effects of phentermine?
- What is the dosage for phentermine?
- Which drugs or supplements interact with phentermine?
- Is phentermine safe to use during pregnancy or while breastfeeding?
- What else should I know about phentermine?
Why is phentermine prescribed to patients?
- Phentermine is combined with diet and exercise for the short-term treatment of obesity in individuals with a body mass index greater than or equal to 30 kg/m2 or greater than or equal to 27 kg/m2 with risk factors for heart disease.
- Phentermine should not be combined with other weight loss agents.
- The combination of phentermine and fenfluramine (FEN-PHEN) is associated with serious heart problems. Fenfluramine is no longer available in the United States.
What are the side effects of phentermine?
Side effects of phentermine include:
- dry mouth,
- an unpleasant taste,
- high blood pressure, and
- fast heart rates (palpitations).
Central nervous system side effects include:
Phentermine, especially when combined with fenfluramine, has been associated with high pressures in the pulmonary arteries (pulmonary hypertension) and defects in heart valves, both serious complications.
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.
What is the dosage for phentermine?
- The recommended dose is 15-37.5 mg once daily.
- Adipex-P is administered about 1-2 hours after breakfast.
- The lowest effective dose should be used and evening doses should be avoided because phentermine causes insomnia.
Which drugs or supplements interact with phentermine?
- Phentermine is similar to amphetamine and may share some of the interactions associated with amphetamines. Combining phentermine with tricyclic antidepressants (for example, amitriptyline [Elavil, Endep]) or monoamine oxidase inhibitors or MAOIs (for example, phenelzine [Nardil], selegiline [Zelapar, Emsam, and Eldepryl], tranylcypromine [Parnate]) may result in high blood pressure and other serious reactions because of elevated serotonin levels in the blood. Phentermine should not be used within 14 days after stopping a monoamine oxidase inhibitor.
- People with diabetes being treated with phentermine may require a reduction in their dose of insulin or oral hypoglycemic drug.
- Combining alcohol with phentermine may result in an adverse drug reaction.
Is phentermine safe to use during pregnancy or while breastfeeding?
What else should I know about phentermine?
What preparations of phentermine are available?
- Tablets: 8 and 37.5 mg.
- Capsules: 15, 30, 37.5 mg.
How should I keep phentermine stored?
Phentermine should be stored in a tight container at room temperature, 20 C to 25 C (68 F to 77 F).
How does phentermine work?
- The exact mechanism of action of phentermine is unknown. It probably decreases appetite by acting on centers in the brain that control appetite. Phentermine is similar to amphetamine. It stimulates the nervous system, elevates blood pressure, and increases heart rate.
Reference: FDA Prescribing Information
Daily Health News
Subscribe to MedicineNet's Weight Loss/Healthy Living Newsletter
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
- phentermine (Adipex-P, Lomaira) Related Diseases
- phentermine (Adipex-P, Lomaira) Images & Quizzes
- phentermine (Adipex-P, Lomaira) Index
Top phentermine Related ArticlesComplete List
Most Effective ExercisesThese seven exercises deliver fitness results at home or in the gym. Start your training to better physical health with the most effective exercises chosen by our experts.
7 Risky ExercisesWorking out is supposed to make you healthier--but some exercises can leave your body at risk of pain or injury. Some exercises are simply ineffective.Ditch these seven moves and learn healthier alternatives.
Take the Nutrition QuizEven if you think you're getting enough fruits and vegetables per day, how can you be sure? Take the Diet & Nutrition Quiz to learn more about eating right.
Drug InteractionsDrug interactions occur frequently. Get facts about the types of drug interactions, what substances or other things that may interact with drugs such as OTC drug and prescription drugs, vitamins, food(s) (grapefruit), and laboratory tests. Find out how to protect yourself from potential drug interactions.
Drugs: What You Should Know About Your DrugsImportant information about your drugs should be reviewed prior to taking any prescription drug. Side effects, drug interactions, warnings and precauctions, dosage, what the drug is used for, what to do if you miss a dose, how the drug is to be stored, and generic vs. brand names.
Take the Exercise QuizTake our Exercise and Fitness Quiz and learn to maximize your fitness level with simple exercises that do not require major changes to your lifestyle.
11 Seeds You Should EatAre pumpkin seeds good for your health? What's the nutritional value of chia seeds? Find out how to easily incorporate more edible, healthy seeds into a diet rich in vitamins and minerals.
Obesity (Weight Loss)Obesity is the state of being well above one's normal weight. A person has traditionally been considered to be obese if they are more than 20% over their ideal weight. That ideal weight must take into account the person's height, age, sex, and build.
OA & Your JointsDealing with joint pain and arthritis? Learn why weight matters--and why NOT to stretch before exercise. See these solutions for joint pain and tips to protect your joints from damage.
phentermine and topiramate extended-release
Qsymia (phentermine and topiramate extended-release) is a combination of two drugs prescribed to treat individuals who are overweight or obese, in conjunction with diet and exercise. Side effects, drug interactions, dosing, storage, and pregnancy safety information should be reviewed prior to taking this medication.
Take the Salt QuizDo you love salt? Take the online Salt Quiz to get the facts about dietary salts and sodium in fruits, vegetables, processed foods, snacks and soups!
Weight Control and Smoking CessationOne concern smokers have when considering quitting smoking is weight gain. Not everyone will gain weight when they stop smoking. There are lifestyle changes that can be made to avoid weight gain during smoking cessation. Lifestyle changes include regular exercise, proper nutrition, limiting snacking and alcohol, medication, and weight management counseling.