Risperidone

generic for Risperdal

Risperidone Side Effects

Drowsiness, dizziness, lightheadedness, drooling, nausea, weight gain, or tiredness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Dizziness and lightheadedness can increase the risk of falling. Get up slowly when rising from a sitting or lying position.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: difficulty swallowing, muscle spasms, shaking (tremor), mental/mood changes (such as anxiety, restlessness), interrupted breathing during sleep.

This medication may rarely make your blood sugar rise, which can cause or worsen diabetes. Tell your doctor right away if you have symptoms of high blood sugar such as increased thirst/urination. If you already have diabetes, check your blood sugar regularly as directed and share the results with your doctor. Your doctor may need to adjust your diabetes medication, exercise program, or diet.

This drug may also cause significant weight gain and a rise in your blood cholesterol (or triglyceride) levels. These effects, along with diabetes, may increase your risk for developing heart disease. Discuss the risks and benefits of treatment with your doctor. (See also Notes section.)

Risperidone may rarely cause a condition known as tardive dyskinesia. In some cases, this condition may be permanent. Tell your doctor right away if you develop any unusual/uncontrolled movements (especially of the face, lips, mouth, tongue, arms or legs).

This medication may increase a certain natural substance (prolactin) made by your body. For females, this increase in prolactin may result in unwanted breast milk, missed/stopped periods, or difficulty becoming pregnant. For males, it may result in decreased sexual ability, inability to produce sperm, or enlarged breasts. If you develop any of these symptoms, tell your doctor right away.

Get medical help right away if you have any very serious side effects, including: severe dizziness, fainting, seizures.

This medication may rarely cause a very serious condition called neuroleptic malignant syndrome (NMS). Get medical help right away if you have any of the following symptoms: fever, muscle stiffness/pain/tenderness/weakness, severe tiredness, severe confusion, sweating, fast/irregular heartbeat, dark urine, signs of kidney problems (such as change in the amount of urine).

Rarely, males may have a painful or prolonged erection lasting 4 or more hours. If this occurs, stop using this drug and get medical help right away, or permanent problems could occur.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: fever, swollen lymph nodes, rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
  • pituitary neoplasm
  • diabetes mellitus
  • hypoglycemic disorder
  • hyperprolactinemia
  • SIADH syndrome
  • hypercholesterolemia
  • hypertriglyceridemia
  • water intoxication
  • anemia
  • purpura
  • thrombocytopenic disorder
  • agranulocytosis
  • leukopenia
  • neutropenic disorder
  • acute confusion
  • abnormal sexual function
  • libido changes
  • disorder of ejaculation
  • agitation
  • parkinsonism
  • blepharospasm
  • tardive dyskinesia
  • extrapyramidal disease
  • neuroleptic malignant syndrome
  • photophobia
  • blurred vision
  • visual changes
  • reduced visual acuity
  • conjunctival hyperemia
  • eyelid edema
  • eyelid crusting
  • tinnitus
  • earache
  • hypertension
  • pulmonary thromboembolism
  • atrioventricular block
  • heart block
  • abnormal ECG
  • atrial fibrillation
  • bradycardia
  • sinus tachycardia
  • transient cerebral ischemia
  • cerebrovascular accident
  • cerebral ischemia
  • thrombotic thrombocytopenic purpura
  • orthostatic hypotension
  • hypotension
  • pharyngitis
  • sore throat
  • upper respiratory infection
  • rhinitis
  • nasal congestion
  • pneumonia
  • influenza
  • aspiration pneumonia
  • sialorrhea
  • xerostomia
  • cheilitis
  • gastritis
  • dyspepsia
  • ileus
  • gastrointestinal obstruction
  • constipation
  • urinary tract infection
  • priapism
  • gynecomastia
  • galactorrhea not associated with childbirth
  • mastalgia
  • amenorrhea
  • menstrual disorder
  • toxic epidermal necrolysis
  • Stevens-Johnson syndrome
  • pruritus of skin
  • alopecia
  • seborrhea
  • urticaria
  • arthralgia
  • joint stiffness
  • back pain
  • muscle spasm
  • rhabdomyolysis
  • muscle weakness
  • myalgia
  • altered consciousness
  • drowsy
  • sedation
  • concentration difficulty
  • altered mental status
  • syncope
  • seizure disorder
  • vertigo
  • dizziness
  • sleep disorder
  • insomnia
  • sleep apnea
  • fever
  • fatigue
  • tremor
  • akathisia
  • dysgeusia

Drug Interactions

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

A product that may interact with this drug is: metoclopramide.

Tell your doctor or pharmacist if you are taking other products that cause drowsiness such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana (cannabis), drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), or antihistamines (such as cetirizine, diphenhydramine).

Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.