(See also the Notes section.) Rarely does this medication cause an extremely severe allergic reaction. Have a conversation with your doctor about the advantages and disadvantages of the proposed course of treatment. Falls can become more likely if you feel lightheaded or dizzy. It's possible to experience fatigue, drowsiness, dizziness, lightheadedness, drooling, nausea, or weight gain. Women may experience missed or stopped periods, unwelcome breast milk, or trouble getting pregnant as a result of this prolactin increase. Males may experience a decline in sex prowess, sperm production problems, or enlarged breasts as a result. If you experience any of the following symptoms, seek immediate medical attention: fever, severe fatigue, severe confusion, muscle pain, stiffness, or weakness; sweating; a fast or irregular heartbeat; dark urine; or indications of kidney disease (such as a change in the amount of urine). If you experience any extremely serious side effects, such as severe vertigo, fainting, or seizures, seek medical attention right away. Get up slowly when rising from a sitting or lying position. But if you experience any of the following signs of a serious allergic reaction, seek medical attention right away: fever, swollen lymph nodes, rash, itching or swelling (especially of the face, tongue, or throat), extreme dizziness, or difficulty breathing. Inform your doctor or pharmacist right away if any of these side effects last longer than expected or get worse. If this occurs, stop using this drug and get medical help right away, or permanent problems could occur. If you already have diabetes, check your blood sugar as directed on a regular basis, and inform your doctor of the results. If you develop any of these symptoms, tell your doctor right away. Contact your doctor or pharmacist if you experience any additional effects not covered above. Call your doctor for medical advice about side effects if you're in Canada. In some cases, this condition may be permanent. Call your doctor in the US for medical advice regarding side effects. Several users report no significant side effects from this medication. A painful or protracted erection in a man that lasts for four or more hours is extremely rare. Keep in mind that your doctor has prescribed this medication because they believe it will benefit you more than it will harm you. Tardive dyskinesia is a rare side effect of risperidone. Tell your doctor right away if you develop any unusual/uncontrolled movements (especially of the face, lips, mouth, tongue, arms or legs). If you experience any severe side effects, such as trouble swallowing, muscle spasms, shaking (tremor), mental/emotional changes (such as anxiety, restlessness), or interrupted breathing while you sleep, call your doctor right away. If you experience high blood sugar symptoms, such as increased thirst or urination, let your doctor know right away. These effects, along with diabetes, may increase your risk for developing heart disease. In addition to potentially raising blood cholesterol (or triglyceride) levels, this medication may cause significant weight gain. Possible side effects are not covered in this list in full. This medication may increase the amount of prolactin your body naturally produces. Neuroleptic malignant syndrome (NMS), a very serious condition, may occasionally be brought on by this medication. Your blood sugar may occasionally rise as a result of this medication, which can worsen or cause diabetes. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. Call 1-866-234-2345 to report side effects to Health Canada. Your diabetes medication, exercise routine, or diet may need to be changed by your doctor.
A product that may interact with this drug is: metoclopramide. Ask your pharmacist about using those products safely. All of your medications, including those for allergies or colds and flu, should have their labels read carefully because they might contain drowsiness-inducing ingredients. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Your risk of experiencing serious side effects may increase or your medication's effectiveness may change due to drug interactions. Keep a list of everything you use, including prescription, over-the-counter, and herbal medications, and give it to both your doctor and pharmacist. Inform your doctor or pharmacist if you are taking any other medications that make you drowsy, including alcohol, marijuana (cannabis), sedatives (alprazolam, lorazepam), muscle relaxants (carisoprodol, cyclobenzaprine), antihistamines (cetirizine, diphenhydramine), or opioid pain relievers (codeine, hydrocodone). Not all possible drug interactions are covered in this document.
You might feel more groggy or faint if you drink alcohol or use marijuana (cannabis). Steer clear of alcoholic beverages. Avoid engaging in activities that could make you overheat, such as strenuous exercise in warm weather or hot tub use. Rarely, symptoms like muscle stiffness or shakiness, drowsiness, feeding/breathing issues, or persistent crying may appear in babies born to mothers who used this medication during the last three months of their pregnancy. Tell your doctor or dentist if you are currently taking this medication or have ever taken it, as well as about all other products you use, including prescription medications, over-the-counter medicines, and herbal remedies, before having surgery (including cataract/glaucoma eye surgery). Inform your doctor or pharmacist if you have any allergies before taking risperidone, paliperidone, or any other medications. If you have any of the following conditions before taking risperidone: heart failure, slow heartbeat, QT prolongation in the EKG, family history of certain heart conditions (QT prolongation in the EKG, sudden cardiac death), certain heart problems (heart failure, slow heartbeat, QT prolongation in the EKG). Inform your doctor or pharmacist of your medical history before taking this medication, especially of: liver disease, kidney disease, seizures, difficulty swallowing, low white blood cell count, Parkinson's disease, dementia, certain eye problems (cataracts, glaucoma), personal or family history of diabetes, heart disease, high cholesterol/triglyceride levels, and breathing issues during sleep (sleep apnea). Before breastfeeding, talk to your doctor. Until you can do something safely, avoid driving, operating machinery, and performing other tasks that call for alertness. Falling is more likely when you're sleepy, queasy, or lightheaded. During pregnancy, this medication should be used only when clearly needed. Immediately seek medical attention if you experience a fever that won't go away, mental or mood changes, a headache, or dizziness. Discuss the advantages and disadvantages of using this medication during pregnancy with your doctor as soon as you become pregnant, plan to become pregnant, or suspect you may be pregnant. If you notice any of these symptoms in your newborn especially during their first month, tell the doctor right away. Find a place to cool off and rest right away if you start to feel too hot. Your risk of QT prolongation may also increase if you have low blood potassium or magnesium levels. The adverse effects of this medication, particularly drowsiness, dizziness, lightheadedness, and QT prolongation (see above), may be more noticeable in older adults. Rarely, QT prolongation can result in fast/irregular heartbeat that is serious (rarely fatal) and other symptoms like severe dizziness and fainting that require immediate medical attention. Risperidone may cause a condition that affects the heart rhythm (QT prolongation). Since untreated mental/mood problems (such as schizophrenia, bipolar disorder, depression) can be a serious condition, do not stop taking this medication unless directed by your doctor. Talk to your doctor about using risperidone safely. If you use marijuana (cannabis), consult your physician. Get more information by speaking with your pharmacist. If your infant experiences symptoms like trembling or twitching, unusual sleepiness, or trouble feeding, call the doctor right away. If you have certain medical conditions or are taking other medications that may prolong QT, your risk of QT prolongation may increase. You may experience drowsiness or lightheadedness after taking this medication. Your likelihood of suffering from heat stroke may increase if this medication causes you to sweat less. This medication is excreted in breast milk and could harm a nursing baby. This product might include inactive components that could lead to allergic reactions or other issues. You run a higher risk of developing this condition if you take certain medications (like diuretics or "water pills") or if you experience symptoms like excessive sweating, diarrhea, or vomiting. Drink plenty of fluids and wear loose clothing when the weather is hot.