Drug Interactions

Phendimetrazine can interact with a number of other medications (see Drug Interactions With Phendimetrazine).

What If I Take an Overdose?

People who take too much phendimetrazine may experience the following symptoms:
  • Hyperactivity (trouble sitting still)
  • Fast breathing
  • High blood pressure or low blood pressure
  • Changes in heart rhythm (arrhythmia)
  • Nausea, vomiting, or diarrhea
  • Confusion
  • Fever
  • Muscle pains
  • Shakiness
  • Aggressiveness
  • Hallucinations (seeing or hearing things that are not really there)
  • Seizures
  • Loss of life.
If you happen to overdose on phendimetrazine, seek immediate medical attention.
(Click Bontril Overdose for more information.)

How Should Phendimetrazine Be Stored?

Phendimetrazine tablets and capsules should be stored at room temperature, away from moisture and heat. Keep the tablets and capsules in an airtight container.
Keep phendimetrazine and all other medications out of the reach of children.

What Should I Do If I Miss a Dose?

If you do not take your phendimetrazine as scheduled, take your missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose.

How Does Phendimetrazine Work?

Phendimetrazine works by suppressing the appetite, and it may also increase the metabolism. It is chemically similar to amphetamines.
Last reviewed by: Kristi Monson, PharmD
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