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| Drug
Information for: |
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phentermine
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Click the
Links below for more Information on Warnings, Side
Effects, Pharmacology, Lactation and Pregnancy.
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| phentermine |
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| Pronunciation:
FEN ter meen Brand:
Adipex-P, Fastin,
Ionamin, Obenix, Obephen, Oby-Cap,
Oby-Trim, Panshape M, Phentercot,
Phentride, Pro-Fast HS, Pro-Fast SA,
Pro-Fast SR, Teramine, Zantryl
| What
is the most important
information I should know
about phentermine? |
 |
• |
Use
caution when driving,
operating machinery, or
performing other hazardous
activities. Phentermine may
cause dizziness, blurred
vision, or restlessness, and
it may hide the symptoms of
extreme tiredness. If you
experience these effects,
avoid hazardous activities. |
 |
• |
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. |
 |
• |
Do
not crush, chew or open any
"once-daily"
phentermine tablets or
capsules. Swallow them
whole. |
|
• |
Phentermine
is a sympathomimetic amine,
which is similar to an
amphetamine. It is also
known as an
"anorectic" or
"anorexigenic"
drug. Phentermine stimulates
the central nervous system
(nerves and brain), which
increases your heart rate
and blood pressure and
decreases your appetite. |
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• |
Phentermine
is used as a short-term
supplement to diet and
exercise in the treatment of
obesity. |
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• |
Phentermine
may also be used for
purposes other than those
listed in this medication
guide. |
| Who
should not take phentermine? |
 |
• |
You
cannot take phentermine if
you |
|
· |
have
heart disease or high blood
pressure; |
|
· |
have
arteriosclerosis (hardening
of the arteries); |
|
· |
have
taken a monoamine oxidase
inhibitor (MAOI) such as
isocarboxazid (Marplan),
tranylcypromine (Parnate),
or phenelzine (Nardil) in
the last 14 days; or |
|
· |
have
a history of drug or alcohol
abuse. |
|
• |
Before
taking this medication, tell
your doctor if you have |
|
· |
problems
with your thyroid, |
|
· |
epilepsy
or another seizure disorder,
or |
|
• |
You
may not be able to take
phentermine, or you may
require a lower dose or
special monitoring during
treatment if you have any of
the conditions listed above. |
 |
• |
It
is not known whether
phentermine will harm an
unborn baby. Do not take
phentermine without first
talking to your doctor if
you are pregnant. |
 |
• |
It
is also not known whether
phentermine passes into
breast milk. Do not take
phentermine without first
talking to your doctor if
you are breast-feeding a
baby. |
| How
should I take phentermine? |
|
• |
Take
phentermine exactly as
directed by your doctor. If
you do not understand these
directions, ask your
pharmacist, nurse, or doctor
to explain them to you. |
 |
• |
Take
each dose with a full glass
of water. |
 |
• |
Phentermine
is usually taken once or
twice a day before a meal on
an empty stomach. |
|
• |
Do
not take phentermine in the
evening because it may cause
insomnia. |
|
• |
Do
not crush, chew or open any
"once-daily"
phentermine tablets or
capsules. Swallow them
whole. |
|
• |
Never
take more of this medication
than is prescribed for you.
Too much phentermine could
be very dangerous to your
health. |
 |
• |
Store
phentermine at room
temperature away from
moisture and heat. |
| What
happens if I miss a dose? |
|
• |
Take
the missed dose as soon as
you remember. However, if it
is almost time for your next
dose or if it is already
evening, skip the missed
dose and take only your next
regularly scheduled dose. A
dose taken too late in the
day will cause insomnia. Do
not take a double dose
of this medication. |
| What
happens if I overdose? |
 |
• |
Seek
emergency medical attention. |
|
• |
Symptoms
of a phentermine overdose
include restlessness,
tremor, rapid breathing,
confusion, hallucinations,
panic, aggressiveness,
nausea, vomiting, diarrhea,
an irregular heartbeat, and
seizures. |
| What
should I avoid while taking
phentermine? |
|
• |
Use
caution when driving,
operating machinery, or
performing other hazardous
activities. Amphetamine may
cause dizziness, blurred
vision, or restlessness, and
it may hide the symptoms of
extreme tiredness. If you
experience these effects,
avoid hazardous activities. |
|
• |
Do
not take phentermine late in
the day. A dose taken too
late in the day can cause
insomnia. |
| What
are the possible side
effects of phentermine? |
|
• |
If
you experience any of the
following serious side
effects, stop taking
phentermine and seek
emergency medical attention: |
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· |
an
allergic reaction
(difficulty breathing;
closing of your throat;
swelling of your lips,
tongue, or face; or hives); |
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· |
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, |
|
· |
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. |
| What
other drugs will affect
phentermine? |
|
• |
You
cannot take phentermine if
you have taken a monoamine
oxidase inhibitor (MAOI)
such as isocarboxazid (Marplan),
tranylcypromine (Parnate),
or phenelzine (Nardil) in
the last 14 days. |
|
• |
Changes
in insulin and other
diabetes drug therapies may
be necessary during
treatment with phentermine. |
|
• |
Phentermine
may reduce the effects of
guanethidine (Ismelin). This
could lead to an increase in
blood pressure. Tell your
doctor if you are taking
guanethidine. |
|
• |
Before
taking this medication, tell
your doctor if you are
taking a tricyclic
antidepressant such as
amitriptyline (Elavil),
amoxapine (Asendin), doxepin
(Sinequan), nortriptyline (Pamelor),
imipramine (Tofranil),
clomipramine (Anafranil),
protriptyline (Vivactil), or
desipramine (Norpramin).
These drugs may decrease the
effects of phentermine. |
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• |
Drugs
other than those listed here
may also interact with
phentermine. Talk to your
doctor and pharmacist before
taking any prescription or
over-the-counter medicines. |
| Where
can I get more information? |
|
• |
Your
pharmacist has more
information about
phentermine written for
health professionals that
you may read. |
|
Remember, keep
this and all other medicines out of
the reach of children, never share
your medicines with others, and use
this medication only for the
indication prescribed.
The
information in this leaflet is not
intended to cover all possible uses,
directions, precautions, drug
interactions, or adverse effects. If
you have questions about the drugs
you are taking, check with your
doctor, nurse, or pharmacist.
© Multum Information Services 1999.
Version: 3.010. Revision date:
4/15/99. |
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Every effort has been made to ensure that
the information provided by Multum is
accurate, up-to-date, and complete, but no
guarantee is made to that effect. In
addition, the drug information contained
herein may be time sensitive and should not
be utilized as a reference resource beyond
the date hereof.
Multum's drug information does not
endorse drugs, diagnose patients, or
recommend therapy. Multum's drug information
is a reference resource designed as
supplement to, and not a substitute for, the
expertise, skill , knowledge, and judgement
of healthcare practitioners in patient care.
The absence of a warning for a given drug or
drug combination in no way should be
construed to indicate that the drug of drug
combination is safe, effective, or
appropriate for any given patient.
Multum Information Services, Inc. does
not assume any responsibility for any aspect
of healthcare administered with the aid of
information Multum provides.
Copyright 2000 Multum Information
Services, Inc. The information in contained
herein is not intended to cover all possible
uses, directions, precautions, warnings,
drug interactions, allergic reactions, or
adverse effects. If you have questions about
the drugs you are taking, check with your
doctor, nurse, or pharmacist.
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