If you experience any of the
following serious side effects,
stop taking phentermine and seek
emergency medical attention:
- an allergic reaction
(difficulty breathing; closing
of your throat; swelling of your
lips, tongue, or face; or
hives);
- an irregular heartbeat or very
high blood pressure (severe
headache, blurred vision); or
- hallucinations, abnormal
behavior, or confusion.
- Other, less serious side
effects may be more likely to
occur. Continue to take phentermine and talk to your
doctor if you experience
- Restlessness or tremor,
- Nervousness or anxiety,
- Headache or dizziness,
- Insomnia,
- Dry mouth or an unpleasant taste in your mouth,
- Diarrhea or constipation, or
- Impotence or changes in your sex drive.
- Phentermine is habit forming.
You can become physically and
psychologically dependent on
this medication, and withdrawal
effects may occur if you stop
taking it suddenly after several
weeks of continuous use. Talk to
your doctor about stopping this
medication gradually.
- Side effects other than those
listed here may also occur. Talk
to your doctor about any side
effect that seems unusual or
that is especially bothersome.
- Cardiovascular: Palpitation,
tachycardia, elevation of blood
pressure.
Central Nervous System:
Overstimulation, restlessness,
dizziness, insomnia, euphoria,
dysphoria, tremor, headache;
rarely psychotic episodes at
recommended doses.
Gastrointestinal: Dryness of
the mouth, unpleasant taste,
diarrhea, constipation, other
gastrointestinal disturbances.
Allergic: Urticaria.
Endocrine: Impotence, changes
in libido.
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