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Phentermine Effects on Liver Function

by
author image Emma Watkins
Emma Watkins writes on finance, fitness and gardening. Her articles and essays have appeared in "Writer's Digest," "The Writer," "From House to Home," "Big Apple Parent" and other online and print venues. Watkins holds a Master of Arts in psychology.
Phentermine Effects on Liver Function
Phentermine works in conjuction with exercise and healthy meals. Photo Credit Jupiterimages/Polka Dot/Getty Images

Phentermine hydrochloride is the generic name of a prescription weight-loss drug. The medicine, which suppresses your appetite, is designed to support a diet program that includes regular exercise and nutritious meals. The drug manufacturer and the "Physicians' Desk Reference" do not list any effects on liver function associated with taking phentermine; nor does MedlinePlus, an information website of the National Institutes of Health. But that site says that side effects not listed are also possible.

About Phentermine

Phentermine hydrochloride is a white powder that stimulates the nerve cells in a way that suppresses hunger. But science hasn't discovered how phentermine controls weight gain precisely, according to Drugs.com. Because phentermine's functions are not completely understood, it is possible that the drug does more than suppress your appetite to cause you to lose weight. It is also worth noting that phentermine is a short-term treatment that lasts three to six weeks. Prolonged use of this chemical can develop into an addiction.

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Phentermine Side Effects

Although phentermine seems to spare your liver from a direct hit, it can affect other areas of your body adversely. It may disrupt your gastrointestinal system, for instance, causing constipation or diarrhea, as well as stomach upset. The drug can also induce deep depression or euphoria. Other potential reactions to phentermine include dry mouth and unpleasant taste, impotence, accelerated heartbeat, hypertension, dizziness, headaches, hives, insomnia, restlessness and tremors.

Who Uses Phentermine

Phentermine is formulated for severely overweight patients 17 years of age and older. The drug is also for individuals who have a health condition that can get worse because they are obese. A doctor determines what the aggravating circumstances are. Some health problems that may prompt her to prescribe phentermine to overweight patients are hypertension, high cholesterol and diabetes.

Phentermine Dosage

The general phentermine dosage is one whole pill daily. But it is important to follow the individualized prescription your doctor writes for you to minimize the risk of side effects. Phentermine tablets are scored for easy dividing in case your physician determines that half of the usual daily dose is best for you. She may also instruct you to take half of a pill twice daily. Take morning tablets before breakfast or one to two hours after you eat. If you take phentermine twice daily, have the second half of the tablet late afternoon to early evening to prevent sleeplessness in the middle of the night.

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