Ionamin (phentermine resin) is a stimulant used together with diet and exercise to treat obesity (overweight) in people with risk factors such as:
- high blood pressure,
- high cholesterol, or
The brand name Ionamin is discontinued, but generic versions may be available.
IONAMIN SIDE EFFECTS
Common side effects of Ionamin (phentermine resin) include:
- dry mouth or unpleasant taste in the mouth,
- difficulty sleeping (insomnia),
- increased or decreased interest in sex, or impotence
DOSAGE FOR IONAMIN
The dose of Ionamin is one capsule daily, before breakfast or 10-14 hours before retiring.
IONAMIN IN CHILDREN
Ionamin is not approved for use in children.
WHAT DRUGS, SUBSTANCES, OR SUPPLEMENTS INTERACT WITH IONAMIN?
Ionamin may interact with blood pressure medications, insulin or oral diabetes medications, guanethidine, or antidepressants. Tell your doctor all medications and supplements you use.
IONAMIN DURING PREGNANCY AND BREASTFEEDING
Ionamin must not be used during pregnancy. It may harm a fetus. If you are pregnant or think you may be pregnant, tell your doctor. This drug may pass into breast milk and could have undesirable effects on a nursing infant. Breastfeeding is not recommended while using this drug.
Withdrawal symptoms may occur if you suddenly stop taking this medication.
Our Ionamin (phentermine resin) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
Cardiovascular: Primary pulmonary hypertension (see WARNINGS), palpitation, tachycardia, the elevation of blood pressure.
Central Nervous System: Overstimulation, restlessness, dizziness, insomnia, euphoria, dysphoria, tremor, headache; rarely psychotic episodes at recommended doses with some drugs in this class.
Gastrointestinal: Dryness of the mouth, unpleasant taste, diarrhea, constipation, other gastrointestinal disturbances.
Endocrine: Impotence, changes in libido.
Phentermine is used with a doctor-approved exercise, behavior change, and reduced-calorie diet program to help you lose weight. It is used by certain overweight people, such as those who are obese or have weight-related medical problems. Losing weight and keeping it off can lessen the many health risks that come with obesity, including heart disease, diabetes, high blood pressure, and a shorter life.
It is not known how this medication helps people to lose weight. It may work by decreasing your appetite, increasing the amount of energy used by your body, or by affecting certain parts of the brain. This medication is an appetite suppressant and belongs to a class of drugs called sympathomimetic amines.
How to use Ionamin Capsule, Extended Release
Take this medication by mouth as directed by your doctor, usually once a day, 1 hour before breakfast or 1 to 2 hours after breakfast. If needed, your doctor may adjust your dose to take a small dose up to 3 times a day. Carefully follow your doctor’s instructions. Taking this medication late in the day may cause trouble sleeping (insomnia).
If you are using sustained-release capsules, the dose is usually taken once a day before breakfast or at least 10 to 14 hours before bedtime. Swallow the medication whole. Do not crush or chew sustained-release capsules. Doing so can release all of the drugs at once, increasing the risk of side effects.
If you are using the tablets made to dissolve in the mouth, the dose is usually taken once a day in the morning, with or without food. First, dry your hands before handling the tablet. Place your dose on top of the tongue until it dissolves, then swallow it with or without water.
The dosage is based on your medical condition and response to therapy. Your doctor will adjust the dose to find the best dose for you. Use this medication regularly and exactly as prescribed in order to get the most benefit from it. To help you remember, take it at the same time(s) each day.
This medication is usually taken for only a few weeks at a time. It should not be taken with other appetite suppressants (see also Drug Interactions section). The possibility of serious side effects increases with longer use of this medication and the use of this drug along with certain other diet drugs.
If you suddenly stop using this medication, you may have withdrawal symptoms (such as depression, severe tiredness). To help prevent withdrawal, your doctor may lower your dose slowly. Withdrawal is more likely if you have used phentermine for a long time or in high doses. Tell your doctor or pharmacist right away if you have withdrawal.
Though it helps many people, this medication may sometimes cause addiction. This risk may be higher if you have a substance use disorder (such as overuse of or addiction to drugs/alcohol). Do not increase your dose, take it more often, or use it for a longer time than prescribed. Properly stop the medication when so directed.
This medication may stop working well after you have been taking it for a few weeks. Talk with your doctor if this medication stops working well. Do not increase the dose unless directed by your doctor. Your doctor may direct you to stop taking this medication.