Phentermine is a sympathomimetic amine, which is similar to an amphetamine. It is also known as an "anorectic" or "anorexigenic" drug. Phentermine stimulates the central nervous system (nerves and brain), which increases your heart rate and blood pressure and decreases your appetite.
Phentermine is used as a short-term supplement to diet and exercise in the treatment of obesity.
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What is Phentermine? What is Phentermine? What is Phentermine?
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| Use caution when driving, operating machinery, or performing other hazardous activities. Phentermine may cause dizziness, blurred vision, or restlessness, and it may hide the symptoms of extreme tiredness. If you experience these effects, avoid hazardous activities. |
| Phentermine is habit forming. You can become physically and psychologically dependent on this medication, and withdrawal effects may occur if you stop taking it suddenly after several weeks of continuous use. Talk to your doctor about stopping this medication gradually. |
| Do not crush, chew or open any "once-daily" phentermine tablets or capsules. Swallow them whole. |
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What is Phentermine? What is Phentermine? What is Phentermine?
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Take phentermine exactly as directed by your doctor. If you do not understand these directions, ask your pharmacist, nurse, or doctor to explain them to you.
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Take each dose with a full glass of water. |
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Phentermine is usually taken once or twice a day before a meal on an empty stomach. |
Do not take phentermine in the evening because it may cause insomnia.
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Do not crush, chew or open any "once-daily" phentermine tablets or capsules. Swallow them whole. |
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Never take more of this medication than is prescribed for you. Too much phentermine could be very dangerous to your health. |
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Store phentermine at room temperature away from moisture and heat. |
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What is Phentermine? What is Phentermine? What is Phentermine?
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You cannot take phentermine if you have taken a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan), tranylcypromine (Parnate), or phenelzine (Nardil) in the last 14 days.
Changes in insulin and other diabetes drug therapies may be necessary during treatment with phentermine.
Phentermine may reduce the effects of guanethidine (Ismelin). This could lead to an increase in blood pressure. Tell your doctor if you are taking guanethidine.
Before taking this medication, tell your doctor if you are taking a tricyclic antidepressant such as amitriptyline (Elavil), amoxapine (Asendin), doxepin (Sinequan), nortriptyline (Pamelor), imipramine (Tofranil), clomipramine (Anafranil), protriptyline (Vivactil), or desipramine (Norpramin). These drugs may decrease the effects of phentermine.
Drugs other than those listed here may also interact with phentermine. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.