Risperdal
Brand
name:Risperdal
Pronounced: RIS-per-dal
Generic name:Risperidone
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Why
is Risperdal prescribed?
Risperdal
is prescribed for the treatment of schizophrenia, the crippling
mental disorder that causes victims to lose touch with reality.
Risperdal is thought to work by muting the impact of dopamine
and serotonin, two of the brain's key chemical messengers.
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Most
important fact about Risperdal
Risperdal
may cause tardive dyskinesia, a condition that causes involuntary
muscle spasms and twitches in the face and body. This condition
can become permanent and is most common among older people,
especially women. Tell your doctor immediately if you begin
to have any involuntary movement. You may need to discontinue
Risperdal therapy.
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How
should you take Risperdal?
Do
not take more or less of this medication than prescribed. Higher
doses are more likely to cause unwanted side effects.
Risperdal
may be taken with or without food.
Risperdal
oral solution comes with a calibrated pipette to use for measuring.
The oral solution can be taken with water, coffee, orange juice,
and low-fat milk, but not with cola drinks or tea.
--If
you miss a dose...
Take
it as soon as you remember. If it is almost time for your next
dose, skip the one you missed and go back to your regular schedule.
Do not take 2 doses at once.
--Storage
instructions...
Store
at room temperature. Protect tablets from light and moisture;
protect oral solution from light and freezing.
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What
side effects may occur?
Side
effects cannot be anticipated. If any develop or change in intensity,
tell your doctor as soon as possible. Only your doctor can determine
if it is safe for you to continue taking Risperdal.
More common side effects may include:
Abdominal pain, abnormal walk, agitation, aggression, anxiety,
chest pain, constipation, coughing, decreased activity, diarrhea,
difficulty with orgasm, diminished sexual desire, dizziness,
dry skin, erection and ejaculation problems, excessive menstrual
bleeding, fever, headache, inability to sleep, increased dreaming,
increased duration of sleep, indigestion, involuntary movements,
joint pain, lack of coordination, nasal inflammation, nausea,
overactivity, rapid heartbeat, rash, reduced salivation, respiratory
infection, sleepiness, sore throat, tremor, underactive reflexes,
urination problems, vomiting, weight gain
Less
common side effects may include:
Abnormal vision, back pain, dandruff, difficult or labored breathing,
increased saliva, sinus inflammation, toothache
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Why
should Risperdal not be prescribed?
If
you are sensitive to or have ever had an allergic reaction to
Risperdal or other major tranquilizers, you should not take
this medication.
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Special
warnings about Risperdal
You
should use Risperdal cautiously if you have kidney, liver, or
heart disease, seizures, breast cancer, thyroid disorders, or
any other diseases that affect the metabolism (conversion of
food into energy and tissue). Use caution, too, if you've had
a stroke or mini-strokes, suffer from fluid loss or dehydration,
or expect to be exposed to extremes of temperature.
Be
aware that Risperdal may mask signs and symptoms of drug overdose
and of conditions such as intestinal obstruction, brain tumor,
and Reye's syndrome (a dangerous neurological condition that
may follow viral infections, usually occurring in children).
Risperdal can also cause difficulty when swallowing, which in
turn can cause a type of pneumonia.
Risperdal
may cause Neuroleptic Malignant Syndrome (NMS), a condition marked
by muscle stiffness or rigidity, fast heartbeat or irregular pulse,
increased sweating, high fever, and high or low blood pressure.
Unchecked, this condition can prove fatal. Call your doctor immediately
if you notice any of these symptoms. Risperdal therapy should
be discontinued.
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This
drug may impair your ability to drive a car or operate potentially
dangerous machinery. Do not participate in any activities that
require full alertness if you are unsure of your ability.
Risperdal
can cause orthostatic hypotension (low blood pressure when rising
to a standing position), with dizziness, rapid heartbeat, and
fainting, especially when you first start to take it. If you
develop this problem, report it to your doctor. He can adjust
your dose to reduce the symptoms.
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Possible
food and drug interactions
If Risperdal is taken with certain other drugs, the effects
of either can be increased, decreased, or altered. It is especially
important to check with your doctor before combining Risperdal
with the following:
Blood
pressure medicines such as Aldomet, Procardia, and Vasotec
Bromocriptine mesylate (Parlodel)
Carbamazepine (Tegretol)
Clozapine (Clozaril)
Fluoxetine (Prozac)
Levodopa (Sinemet, Larodopa)
Quinidine (Quinidex)
Risperdal
tends to increase the effect of blood pressure medicines.
You
may experience drowsiness and other potentially serious effects
if Risperdal is combined with alcohol and other drugs that slow
the central nervous system such as Valium, Percocet, Demerol,
or Haldol.
Check
with your doctor before taking any new medications.
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Special
information
The safety and effectiveness of Risperdal during pregnancy have
not been adequately studied. If you are pregnant or plan to
become pregnant, tell your doctor immediately. Risperdal makes
its way into breast milk, so women taking Risperdal must avoid
breastfeeding.
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Recommended
dosage
ADULTS
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Doses of Risperdal can be taken once a day, or divided in half
and taken twice daily. The usual dose on the first day is 2
milligrams or 2 milliliters of oral solution. On the second
day, the dose increases to 4 milligrams or milliliters, and
on the third day rises to 6 milligrams or milliliters. Further
dosage adjustments can be made at intervals of 1 week. Over
the long term, typical daily doses range from 2 to 8 milligrams
or milliliters.
If you have a liver or kidney disease, your doctor will have
you start with one-half of a 1-milligram tablet or 0.5 milliliter
of oral solution twice daily and may then increase your dosage
by one-half tablet or 0.5 milliliter per dose. Increases above
the 1.5-milligram level are typically made at 1 week intervals.
CHILDREN
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The safety and effectiveness of Risperdal in children have not
been established.
OLDER ADULTS
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Older adults generally take Risperdal at lower doses. The usual
starting dose is one-half of a 1-milligram tablet or 0.5 milliliter
of oral solution twice daily. Your doctor may increase the dose
gradually and possibly switch you to a once-a-day dosing schedule
after the first 2 to 3 days of drug therapy.
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Overdosage
Any
medication taken in excess can have serious consequences. If
you suspect an overdose of Risperdal, seek medical attention
immediately.
Symptoms of Risperdal overdose may include:
Drowsiness, low blood pressure, rapid heartbeat, sedation
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