What side effects may I notice from receiving Risperdal?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-breast enlargement in both males and females
-breathing problems
-confusion
-fast, irregular heartbeat
-fever or chills, sore throat
-inability to keep still
-males: prolonged or painful erection
-missed menstrual periods
-problems with balance, talking, walking
-redness, blistering, peeling, or loosening of the skin, including inside the mouth
-seizures
-signs and symptoms of high blood sugar such as being more thirsty or hungry or having to urinate more than normal. You may also feel very tired or have blurry vision
-signs and symptoms of low blood pressure like dizziness; feeling faint or lightheaded, falls; unusually weak or tired
-signs and symptoms of neuroleptic malignant syndrome like confusion; fast or irregular heartbeat; high fever; increased sweating; stiff muscles
-sudden numbness or weakness of the face, arm, or leg
-suicidal thoughts or other mood changes
-trouble swallowing
-uncontrollable movements of the arms, face, head, mouth, neck, or upper body
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-changes in sex drive or performance
-constipation
-drowsiness
-dry mouth
-upset stomach
-weight gain

This list may not describe all possible side effects for Risperdal. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.