Without a Prescription
Risperdal is thought to work by muting the impact of dopamine and serotonin, two of the brain's key chemical messengers.
Risperdal is prescribed for the treatment of schizophrenia, the crippling mental disorder that causes victims to lose touch with reality.
Risperdal is contraindicated if you have any of the following conditions:
- If you have an allergic reaction to other major tranquilizers;
- If you have an allergic reaction to Risperdal;
- if you have any other diseases that affect the metabolism;
- if you have breast cancer;
- if you have kidney, liver, or heart disease;
- if you have seizures;
- if you have thyroid disorders;
Do not take Risperdal with any of the following drugs:
- Quinidine (Quinidex);
- Levodopa (Sinemet, Larodopa);
- Fluoxetine (Prozac);
- Clozapine (Clozaril);
- Carbamazepine (Tegretol);
- Bromocriptine mesylate (Parlodel);
- Blood Pressure medicines such as Aldomet, Procardia, and Vasotec;
Risperdal side effects that you should report to your health care professional or doctor as soon as possible:
- Abdominal pain;
- Abnormal movements of the hands, legs, face, neck and tongue, eg tremor, twitching, rigidity;
- Abnormal vision;
- Abnormal walk;
- Back pain;
- Blurred vision;
- Chest pain;
- Concentration difficulties;
- Decreased activity;
- Decreased numbers of white blood cells or platelets in the blood;
- Difficult or labored breathing;
- Difficulty in sleeping;
- Difficulty with orgasm;
- Diminished sexual desire;
- Disturbances of the gut such as constipation, nausea, vomiting or abdominal pain;
- Dry skin;
- Erection and ejaculation problems;
- Excessive fluid retention in the body tissues, resulting in swelling;
- Excessive menstrual bleeding;
- High blood glucose level;
- High blood prolactin level - rarely this may lead to symptoms such as breast enlargement, production of milk and menstrual disturbances;
- Inability to sleep;
- Increased dreaming;
- Increased duration of sleep;
- Increased saliva;
- Inflammation of the lining of the nose causing a blocked or runny nose;
- Involuntary movements;
- Joint pain;
- Lack of coordination;
- Nasal inflammation;
- Prolonged erection;
- Rapid heartbeat;
- Reduced salivation;
- Respiratory infection;
- Sexual problems;
- Sinus inflammation;
- Sore throat;
- Underactive reflexes;
- Urinary incontinence;
- Urination problems;
- Weight gain;
Reported Risperdal overdose symptoms are:
- Low blood pressure;
- Rapid heartbeat;
The safety and effectiveness of Risperdal in children have not been established.
Doses of Risperdal can be taken once a day, or divided in half and taken twice daily.
Further dosage adjustments can be made at intervals of 1 week.
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.
On the second day, the dose increases to 4 milligrams or milliliters, and on the third day rises to 6 milligrams or milliliters.
Over the long term, typical daily doses range from 2 to 8 milligrams or milliliters.
The usual dose on the first day is 2 milligrams or 2 milliliters of oral solution.
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.