Risperdal, or Risperidone, is an antipsychotic, and is used to treat symptoms of psychotic disorders, such as schizophrenia.
Be sure to tell your doctor of any allergies you have whether it is to medication or food, preservatives, or dyes. Tell your doctor immediately if you are, or become pregnant, or are breastfeeding, as it is unknown how Risperdal may affect your baby. Also tell your doctor of any other medications you are taking, including vitamins and supplements, and any medical conditions you may have.
Avoid alcohol when taking this medicine.
It is very important that you take this medicine exactly as your doctor tells you to. Do not take more or less medicine than directed, and never stop taking Risperdal without discussing it with your doctor first.
If you miss a dose of this medicine, take it as soon as you remember, unless it is almost time for your next dose. Do NOT double doses.
Stop taking Risperdal and get medical help immediately if any of the following side effects occur: convulsions; difficult or fast breathing; fast heartbeat or irregular pulse; fever; high or low blood pressure; increased sweating; loss of bladder control; muscle stiffness; unusually pale skin; or unusual tiredness or weakness.
Tell your doctor immediately if any of the following side effects occur: difficulty in speaking or swallowing; inability to move eyes; muscle spasms of face, neck, and back; twisting movements of body; speech or vision problems; or sudden weakness or numbness in the face, arms or legs.
RISPERDAL (risperidone) is a psychotropic agent belonging to the chemical class of benzisoxazole derivatives. The chemical designation is 3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl) -1-piperidinyl]ethyl]- 6,7,8,9- tetrahydro-2-methyl-4H-pyrido [1,2-a] pyrimidin-4-one. Its molecular formula is C23H27FN4O2 and its molecular weight is 410.49. RISPERDAL tablets are available in 0.25 mg (dark yellow), 0.5 mg (red-brown), 1 mg (white), 2 mg (orange), 3 mg (yellow), and 4mg (green) strengths. Inactive ingredients are colloidal silicon dioxide, hypromellose, lactose, magnesium stearate, microcrystalline cellulose, propylene glycol, sodium lauryl sulfate, and starch (corn). Tablets of 0.25, 0.5, 2, 3, and 4 mg also contain talc and titanium dioxide. The 0.25mg tablets contain yellow iron oxide; the 0.5 mg tablets contain red iron oxide; the 2 mg tablets contain FD&C Yellow No. 6 Aluminum Lake; the 3mg and 4 mg tablets contain D&C Yellow No. 10; the 4 mg tablets contain FD&C Blue No. 2 Aluminum Lake. RISPERDAL is also available as a 1 mg/mL oral solution. The inactive ingredients for this solution are tartaric acid, benzoic acid, sodium hydroxide, and purified water. RISPERDAL M-TAB Orally Disintegrating Tablets are available in 0.5 mg, 1 mg, and 2 mg strengths and are light coral in color. RISPERDAL M-TAB Orally Disintegrating Tablets contain the following inactive ingredients: Amberlite resin, gelatin, mannitol, glycine, simethicone, carbomer, sodium hydroxide, aspartame, red ferric oxide, and peppermint oil.
Risperdal has the following structural formula: