Phendimetrazine

Phendimetrazine

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Rare

  • Seeing, hearing, or feeling things that are not there
  • Severe mental changes

Incidence not known

  • Anxiety
  • Burning while urinating
  • Difficult or painful urination
  • Dizziness
  • Dry mouth
  • Fast, irregular, pounding, or racing heartbeat or pulse
  • Feeling of warmth
  • Headache
  • Hyperventilation
  • Increased need to urinate
  • Irritability
  • Nervousness
  • Numbness or tingling in the arms or legs
  • Passing urine more often
  • Redness of the face, neck, arms, and occasionally, upper chest
  • Restlessness
  • Shakiness in the legs, arms, hands, or feet
  • Shortness of breath
  • Sweating
  • Trembling or shaking of the hands or feet
  • Trouble sleeping
  • Trouble thinking, speaking, or walking
  • Weakness

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

  • Abdominal or stomach cramps
  • Blurred vision
  • Change in consciousness
  • Convulsions
  • Diarrhea
  • Discouragement
  • Dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • Fainting
  • Fast, slow, or irregular heartbeat
  • Feeling sad or empty
  • Lack of appetite
  • Lightheadedness
  • Loss of consciousness
  • Loss of interest or pleasure
  • Nausea
  • Overactive reflexes
  • Panic
  • Physical attempt to injure
  • Pounding in the ears
  • Rapid breathing
  • Sweating
  • Tiredness
  • Trouble concentrating
  • Unusual tiredness or weakness
  • Violent actions
  • Vomiting

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not known

  • Decreased interest in sexual intercourse
  • Difficulty having a bowel movement (stool)
  • Inability to have or keep an erection
  • Increased in sexual ability, desire, drive, or performance
  • Increased interest in sexual intercourse
  • Loss in sexual ability, desire, drive, or performance
  • Sleeplessness
  • Stomach pain
  • Unable to sleep

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Proper Use

Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. If too much is taken, it may become habit-forming (causing mental or physical dependence).

This medicine is available in two forms: slow-release capsules and tablets. Ask your doctor which dosage form is right for you.

Carefully follow your doctor’s instructions for a reduced-calorie diet plan and regular exercise. Talk with your doctor before starting any exercise program.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor’s orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For treatment of obesity:
    • For oral dosage form (slow-release capsules):
      • Adults and teenagers—One capsule or 105 milligrams (mg) once a day, taken 30 to 60 minutes before the morning meal.
      • Children younger than 12 years of age—Use is not recommended.
    • For oral dosage form (tablets):
      • Adults—One tablet or 35 milligrams (mg) two or three times a day, taken one hour before meals. Your doctor may adjust your dose as needed. However, the dose is usually not more than 2 tablets three times a day.
      • Children—Use and dose must be determined by your doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of phendimetrazine tablets in the pediatric population. Safety and efficacy have not been established.

Use of phendimetrazine slow-release capsules is not recommended in children younger than 12 years of age.

Geriatric

No information is available on the relationship of age to the effects of phendimetrazine in geriatric patients.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Brofaromine
  • Clorgyline
  • Furazolidone
  • Iproniazid
  • Isocarboxazid
  • Lazabemide
  • Linezolid
  • Moclobemide
  • Nialamide
  • Pargyline
  • Phenelzine
  • Procarbazine
  • Rasagiline
  • Selegiline
  • Sibutramine
  • Toloxatone
  • Tranylcypromine

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Agitated state or
  • Arteriosclerosis (hardening of the arteries), advanced or
  • Drug abuse or dependence, history of or
  • Glaucoma or
  • Heart problems (e.g., heart murmur, valvular heart disease) or
  • Hypertension (high blood pressure), moderate to severe or
  • Hyperthyroidism (overactive thyroid)—Should not be used in patients with these conditions.
  • Hypertension (high blood pressure), mild—Use with caution. May make these conditions worse.

Description

Phendimetrazine is used as a part of short-term plan, along with a low calorie diet, for weight reduction in obese patients who have not been able to lose weight on diet and exercise alone. It belongs to the group of medicines known as sympathomimetic appetite suppressants.

This medicine is available only with your doctor’s prescription.

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