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Generic name: benzphetamine [benz-FET-ah-meen]

What is Regimex?

Regimex contains a stimulant similar to amphetamine. This medicine affects the central nervous system and is used to suppress appetite.Use Regimex in conjunction with diet and exercise for the treatment of obesity.This medication guide does not list all possible uses for Regimex.

Side effects of Regimex

If you experience any of the following symptoms of an allergic reaction, seek emergency medical attention: hives, difficulty breathing, swelling of your lips, face, tongue, or throat.

Regimex can cause serious side effects. If you experience:

  • Rapid weight gain, swelling, and shortness of breath even with mild exercise;
  • Chest pain, feeling like you might pass out;
  • If you feel your heart pounding or your chest fluttering, then this is a sign that it's time to seek medical attention.
  • Unusual thoughts or behaviors, confusion, or irritability;
  • High blood pressure can be dangerous (headache, anxiety, blurred vision or buzzing in the ears, chest pains, irregular heartbeats, seizures, confusion).

Some of the common side effects associated with Regimex include:

  • Feeling restless or hyperactive
  • Headache, dizziness, tremors;
  • Sleep problems (insomnia);
  • Increased sweating
  • Dry mouth or a bad taste in the mouth
  • Nausea, diarrhea, upset stomach,
  • Skin

There may be other side effects.Call your doctor for medical advice about side effects. To report adverse effects, you can contact the FDA at 1-800-FDA-1088.

Similar/related drugs

Ozempic, phentermine, Wegovy, semaglutide, Saxenda, and Alli


Regimex may harm an unborn child or cause birth defects. This medicine should not be used if you're pregnant.If you've used an MAO inhibitor in the last 14 days, do not use Regimex. Harmful drug interactions may occur. MAO inhibitors are isocarboxazid (linezolid), phenelzine (rasagiline), selegiline (tranylcypromine), methylene blue injection, phenelzine, and others.Combining Regimex with other diet medicines (including those available over-the-counter) can lead to a rare lung condition that is fatal, called hypertension pulmonary. This medicine should not be taken with other diet drugs without consulting your doctor.It is important to use Regimex only for the prescribed person. Do not share this medication with anyone, especially if they have a history of drug addiction. Track the amount used in each bottle. You should know that this medicine is a drug for abuse.

Before you take this drug

If you've used an MAO inhibitor in the last 14 days, don't use Regimex. It is possible that a dangerous drug interaction will occur. MAO inhibitors are isocarboxazid (linezolid), phenelzine (phenelzine injection), rasagiline (selegiline), tranylcypromine, and other drugs.The combination of Regimex and other diet drugs (including those available over-the-counter) can lead to pulmonary hypertension, a rare but fatal lung condition. This medicine should not be taken with other diet medications without consulting your doctor.

If you are allergic or have any of the following:

  • Coronary arterial disease
  • Heart disease heart rhythm disorder
  • High blood pressure that is uncontrollable or severe;
  • Overactive thyroid
  • Glaucoma;
  • If you are pregnant,
  • If you have a past history of alcohol or drug abuse,
  • If you've used other diet pills in the last year,

Tell your doctor about any of the following to ensure Regimex will be safe for you:

  • High blood pressure
  • Diabetes
  • A thyroid disorder.

It is important that only the prescribed person uses Regimex. Do not share this medication with anyone, especially if they have a history of addiction or drug abuse.FDA pregnancy category X This medication may harm an unborn child or cause birth defects. Do not use Regimex while pregnant. Inform your doctor immediately if you are pregnant during treatment. While using this medication, use effective birth control.Benzphetamine may pass into breast milk and harm a nursing infant. Breast-feeding is not recommended while on benzphetamine.This medication should not be given to children younger than 12 years of age.

How to take Regimex?

Do not exceed the dosage prescribed by your physician. Take no more or less than prescribed. You should follow the instructions on your prescription label.It is recommended that Regimex be taken at midday or in the afternoonSpeak to your doctor if the medication does not seem to be working as it should. More medication won't make this medication more effective. It can have serious and life-threatening side effects.It is recommended that Regimex be taken for only a few days or weeks. If you do not lose weight after four weeks, tell your doctor.Regimex may be part of a comprehensive treatment program that includes diet, exercise, and weight management. You should closely monitor your diet, medications, and exercise regimens.Keep away from moisture and heat at room temperature.Track the amount of medicine consumed from each new bottle. Regimex can be abused, so you need to know if someone is taking your medicine without a prescription or improperly.

What happens if I miss the dose?

Take the missed dose as soon as you remember. Skip the missed dosage if your next dose is scheduled soon. Do not increase your dose to make up for the missed one.

What happens if I overdose?

Call Poison Help at 1-800-222-1222 or seek emergency medical care. An overdose of Regimex may be fatal.Overdose symptoms include confusion, panic, or feeling hostile. They may also include nausea, vomiting, diarrhea, cramps in the stomach, muscle pain, weakness, or fever. Other symptoms are dark urine, an irregular heartbeat or pulse, slow breathing, or feeling light-headed.

What should be avoided?

Alcohol can enhance certain side effects of benzphetamine.Avoid taking this medication in the late afternoon to prevent sleep disturbances.Regimex can impair your reactions or thinking. You should be careful when driving or doing anything else that requires you to remain alert.

Interaction with other drug

Tell your doctor if you are taking any other medications or if you stopped using them during your Regimex treatment.

  • An antidepressant--citalopram, escitalopram, desvenlafaxine, duloxetine, fluoxetine, paroxetine, sertraline, venlafaxine, vilazodone, and others;
  • A stimulant or adhd medicine such as adderall and ritalin.

This list is incomplete. Other drugs, such as vitamins and herbal products, may interact with benzphetamine. This medication guide does not list all possible interactions.