Phentermine diet pills require a prescription from your physician because of the potential for abuse. Phentermine is an amphetamine-like drug, which is why they are more addictive than some other products on the market. Donald Hensrud, an M.D. with the Mayo Clinic, reports that the Food and Drug Administration has only approved phentermine for short-term use. Talk about the risks and possible complications while deciding if phentermine is right for you.
Use
Phentermine has been approved by the FDA for short-term use to treat obesity. Phentermine is a strong weight-loss drug and is not intended to be used for patients who need to lose just a few pounds. This diet pill can be habit-forming, according to Drugs.com, which is why you should never share the medication with anyone and should only take it as prescribed by your physician. Since phentermine is amphetamine-like, it's better to take it earlier in the day so that the medication can begin to wear off prior to bedtime.
Time Frame
Phentermine is not to be used for longer than 12 weeks, according to MayoClinic.com. Depending upon your weight-loss needs, your physician may even prescribe phentermine for a shorter period of time. It is only meant to help jump-start your weight loss --- not act as a substitute for healthy diet and exercise. If your doctor only prescribes phentermine for a very short period of time, he may refill or write a new prescription if you have not achieved the desired results, in regards to an initial jump-start in your weight loss.
Side Effects
As with most diet pills, phentermine does have possible side effects that you may experience. Side effects include increased blood pressure, dry mouth, blurred vision, dizziness, sleeplessness, nervousness and constipation. You may also feel your heart pounding or fluttering in your chest, shortness of breath, swelling in your ankles or feet, high blood pressure and extreme emotional changes of happiness or sadness.
Interactions with Medications
Phentermine can interact with other medications. Drugs.com notes that these diet pills can interact with blood pressure medications, antidepressants, guanethidine and diabetic medications. Phentermine can interact with oral and injected diabetic medications. Phentermine may also interact with over-the-counter medications and some vitamin supplements. Let your doctor know of all medications you currently take prior to beginning phentermine.
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