Información sobre medicamentos proporcionada por: IBM Micromedex

It is important that your doctor check your or your child's progress at regular visits to make sure this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

Do not use this medicine if you are using or have used an MAO inhibitor (eg, isocarboxazid [Marplan®], linezolid [Zyvox®], methylene blue injection, phenelzine [Nardil®], selegiline [Eldepryl®], or tranylcypromine [Parnate®]) within the past 14 days.

This medicine may cause a heart problem called valvular heart disease and pulmonary arterial hypertension (high blood pressure in the lungs). Your doctor may want you or your child to undergo an echocardiogram test first before using this medicine, every 6 months during treatment, and once 3 to 6 months after the last dose to check for these unwanted effects. Tell your doctor if you or your child have a decreased ability to exercise, swelling of the feet or lower legs, trouble breathing, chest pain or discomfort, or fainting.

This medicine may cause decreased appetite and weight loss, which could especially affect your child's growth and development. Talk to your doctor if you have any concerns.

Check with your doctor right away if you or your child have anxiety, restlessness, a fast heartbeat, fever, sweating, muscle spasms, twitching, nausea, vomiting, diarrhea, or see or hear things that are not there. These may be symptoms of a serious condition called serotonin syndrome. The risk may be higher if you or your child also take certain other medicines that affect the serotonin levels in the body.

This medicine may make you or your child dizzy or drowsy. Do not drive or do anything else that could be dangerous until you or your child know how this medicine affects you.

This medicine may cause some people to be agitated, irritable, or display other abnormal behaviors. It may also cause some people to have suicidal thoughts and tendencies or to become more depressed. Also tell your doctor if you or your child have sudden or strong feelings, such as feeling nervous, angry, restless, violent, or scared. If you or your caregiver notice any of these side effects, tell your doctor right away.

Do not stop using this medicine without checking first with your doctor. Your doctor may want you or your child to gradually reduce the amount you are using before stopping completely. This will decrease your or your child's chance of having withdrawal symptoms such as dizziness, nausea, headaches, vomiting, increased sweating, irritability, nightmares, seizures, prickling or tingling feelings, or worsening of seizures.

This medicine may be habit-forming. If you feel that the medicine is not working as well, do not use more than your prescribed dose.

Your or your child's blood pressure might get too high while you are using this medicine. This may cause headaches, dizziness, or blurred vision. You or your child might need to measure your blood pressure at home. If you think your or your child's blood pressure is too high, call your doctor right away.

This medicine may cause your eyes to dilate (mydriasis) and glaucoma. Check with your doctor right away if blurred vision, difficulty with reading, eye pain, or any other change in vision occurs during or after treatment. Your doctor may want your or your child's eyes be checked by an ophthalmologist (eye doctor).

Check with your doctor before using this medicine with alcohol or other medicines that affect the central nervous system (CNS). The use of alcohol or other medicines that affect the CNS with fenfluramine may worsen the side effects of this medicine, such as dizziness, poor concentration, drowsiness, unusual dreams, and trouble with sleeping. Some examples of medicines that affect the CNS are antihistamines or medicine for allergies or colds, sedatives, tranquilizers, or sleeping medicines, medicine for depression, medicine for anxiety, prescription pain medicine or narcotics, medicine for attention deficit and hyperactivity disorder, medicine for seizures or barbiturates, muscle relaxants, or anesthetics, including some dental anesthetics.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (eg, St. John's wort) or vitamin supplements.