Phendimetrizine is an FDA-approved medication similar to Phentermine but may be better tolerated than phentermine for some patients. Phendimetrazine is a sympathomimetic amine, which is similar to an amphetamine. It is also known as an “anorectic” or “anorexigenic” drug. Phendimetrazine is used together with diet and exercise to treat obesity (over weight) in people with risk factors such as high blood pressure, high cholesterol, or diabetes. The idea is that taking phendimetrazine initially to kick start a new lifestyle for a severely overweight individual has been proven more beneficial than diet and exercise alone.
How Should I Take Phendimetrizine?
Take exactly as prescribed by your doctor. Do not take larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label. Phendimetrizine is usually taken once daily.
Talk with your doctor if you experience increased hunger or if you think the medication is not working properly. Taking more of this medication will not make it more effective and can cause serious life-threatening side effects. Phendimetrizine should be taken only for a short time, such as a few weeks. Tell your doctor if you have not lost 4 lbs. after 4 weeks of treatment.
Do not stop using phendimetrazine suddenly after long-term use or you could have unpleasant withdrawal symptoms. Ask your doctor how to avoid withdrawal symptoms when you stop using this medicine.
Phendimetrazine stimulates the central nervous system (nerves and brain), which increases your heart rate and blood pressure and decreases your appetite.
What Happens if I Miss a Dose?
Take the missed dose as soon as your remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
A dose taken too late in the evening may cause insomnia.
What are the Possible Side Effects of Phendimetrizine?
Get emergency medical help if you have any of these signs of an allergic reaction to phendimetrazine: hives, difficult breathing, swelling of your face, lips, tongue, or throat.
Less serious side effects of Phendimetrazine may include:
Feeling restless or hyperactive
Headache, dizziness, tremors
Sleep problems (insomnia)
Flushing (warmth, redness, or tingly feeling)
Diarrhea or constipation
Increased or decreased interest in sex
What Should I Avoid When Taking Phendimetrizine?
Phendimetrazine may cause blurred vision or impair your thinking or reactions.
Be careful if you drive or do anything that requires you to be alert and able to see clearly.
Drinking alcohol can increase certain side effects of phendimetrazine.
Tell your doctor about all other medicines you use, especially:
Insulin or oral diabetes medications
Certain blood pressure medications, such as doxazosin (Cardura), prazosin (Minipress), or terazosin (Hytrin)