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Potential Phentermine Side Effects

Phentermine and Health
Phentermine Use
Phentermine Precautions
Phentermine Side Effects

      Phentermine and other appetite suppressants can cause serious and potentially dangerous side effects, including heart problems and lung problems. Discuss the risk of taking Phentermine with a doctor. There are several side effects commonly experienced by Phentermine users. These side effects are usually not serious and will usually disappear after the first couple of weeks taking Phentermine.

Common side effects of Phentermine include:

- constipation
- dizziness or lightheadedness
- dryness of mouth
- heightened sense of well-being
- headache
- irritability
- nausea
- nervousness or restlessness
- stomach cramps or pain
- trembling or shaking
- trouble in sleeping

      If any of these side effects persist for longer than 2 weeks after starting Phentermine, a doctor should be consulted.

Less common side effects of Phentermine can indicate serious health problems. Consult with a doctor immediately if any of the following side effects occur:

- chest pain
- decreased ability to exercise
- fainting
- swelling of feet or lower legs
- difficulty breathing
- increased blood pressure
- difficult or painful urination
- fast or irregular heartbeat
- hallucinations, headache (severe)
- mental depression
- numbness or tingling
- skin rash or hives
- sore throat

      A doctor should be consulted immediately if any of these less common side effects are experienced while taking Phentermine.

As with any medication, it is important to understand the symptoms of overdose.

Overdose symptoms include:

- abdominal or stomach cramps
- coma
- confusion
- convulsions (seizures)
- diarrhea (severe)
- dizziness, lightheadedness, or fainting
- fast breathing
- feeling of panic
- fever
- hallucinations high or low blood pressure
- hostility with urge to attack
- irregular heartbeat
- nausea or vomiting (severe)
- overactive reflexes
- restlessness
- trembling or shaking
- tiredness, weakness, and mental depression following effects of excitement

      Abusing Phentermine, or any other sympathomimetic appetite suppressant, refers to taking Phentermine in too large doses or taking Phentermine more frequently or for a longer duration than advised by a doctor.

- changes in personality
- excessive activity
- irritability
- mental illness
- skin disorders
- severe difficulty sleeping

      After a patient stops taking Phentermine, the body may take some time to adjust. If any side effects are experienced after ceasing Phentermine use, consult a doctor.

Learn more about phentermine and other medications at the FDA's Center for Drug Evaluation and Research website. Find more information about phentermine diet pills at the National Institutes of Health.

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