Like all medicines, this medicine can cause side effects, although not everyone will experience them.
Inform your doctor immediately if you experience any of the following:
• Blood clots in the veins, especially in the legs (symptoms include swelling, pain, and redness of the leg), which can travel through the blood vessels to the lungs causing chest pain and difficulty breathing. If you experience any of these symptoms, seek medical advice.
• Dementia and a sudden change in your mental state or sudden weakness or numbness in the face, arms, or legs, especially on one side, or difficulty speaking even for a short period of time. These may be signs of a heart attack.
• Fever, muscle stiffness, sweating, or a decrease in consciousness (a condition known as "Neuroleptic Malignant Syndrome"). You may need medical treatment.
• Men: a prolonged or painful erection (priapism). You may need medical treatment.
• Uncontrollable movements of the tongue, mouth, or face. You may need to stop taking this medicine.
• A severe allergic reaction characterized by fever, swelling of the mouth, face, lips, or tongue, difficulty breathing, hives, and sometimes a decrease in blood pressure (anaphylactic reaction).
Very common (may affect more than 1 in 10 people):
- Difficulty staying or remaining asleep
- Parkinsonism: This disease can include slow or altered movement, a feeling of stiffness or tension in the muscles (causing jerky movements) and sometimes a feeling of "freezing" of movement that then restarts. Other signs of parkinsonism include walking slowly dragging the feet, trembling while descending, increased saliva and/or drooling, and loss of facial expression.
- Insomnia
- Feeling drowsy or less alert
- Headache
Common side effects (may affect up to 1 in 10 people):
- Chest infection (bronchitis), common cold symptoms, nasal infection, urinary tract infection, feeling like you have a lump in your throat
- Weight gain, increased appetite, weight loss, decreased appetite
- Euphoria (mania), irritability, depression, anxiety
- Dystonia: A disease that involves involuntary slow or continuous muscle contraction. Although it can affect any part of the body (and may cause abnormal postures), dystonia often affects the facial muscles, including abnormal movements of the eyes, mouth, tongue, or mandible.
- Dizziness
- Dyskinesia: This disease involves involuntary muscle movements and can include repetitive, spasmodic, or twisting movements, or spasms
- Tremor (akathisia)
- Blurred vision
- Abnormal heart rhythm, anomalies in heart electrical conduction, prolonged QT interval in the heart, irregular heartbeat, rapid heartbeat
- Decreased blood pressure when standing (resulting in some people who take paliperidone feeling weakness, dizziness, or loss of consciousness when standing up or sitting down suddenly), increased blood pressure
- Sore throat, cough, congestion
- Abdominal pain, nausea, vomiting, constipation, diarrhea, indigestion, dry mouth, jaw pain
- Increased liver enzymes in the blood
- Itching, skin rash
- Muscle or bone pain, back pain, joint pain
- Loss of menstrual periods
- Fever, weakness, fatigue (cansancio)
Uncommon side effects (may affect up to 1 in 100 people):
- Pneumonia, respiratory tract infection, urinary tract infection, ear infection, angina
- Decreased white blood cell count, decreased platelet count (cells that help stop bleeding), anemia, decreased red blood cell count
- Paliperidone may increase levels of a hormone called "prolactin" that is detected in blood tests (which may or may not cause symptoms). When symptoms of increased prolactin appear, they may include: (in men) breast swelling, difficulty getting or maintaining erections, or other sexual dysfunction, (in women) breast discomfort, milk secretion from the breasts, loss of menstrual periods, or other menstrual cycle problems.
- Diabetes or worsening of diabetes, increased blood sugar, increased blood glucose, weight loss due to decreased appetite causing malnutrition and decreased body weight, increased triglycerides in the blood (a type of fat)
- Sleep disorder, confusion, decreased sexual desire, inability to achieve orgasm, nervousness, anxiety
- Tardive dyskinesia (spasms or involuntary movements that cannot be controlled in the face, tongue, or other parts of the body). Inform your doctor immediately if you experience involuntary movements of the tongue, mouth, or face. You may need to stop taking paliperidone.
- Convulsions (epileptic seizures), fainting, restlessness causing movement of parts of the body, dizziness when standing up, attention disorder, speech problems, loss or alteration of taste, decreased skin sensitivity to pain or touch, sensation of pins and needles, numbness, or tingling of the skin
- Increased sensitivity of the eyes to light, eye infection, or "red eye," dry eyes
- Sensation of spinning (vertigo), ringing in the ears, ear pain
- Irregular heartbeat, anomaly in heart electrical activity (electrocardiogram or ECG), sensation of fluttering or pounding in the chest (palpitations)
- Decreased blood pressure
- Labored breathing, gasping, nosebleeds
- Swollen tongue, stomach or intestinal infection, difficulty swallowing, excessive gas or flatulence
- Increased GGT (a liver enzyme called gamma-glutamyltransferase) in the blood, increased liver enzymes in the blood
- Hives (urticaria), hair loss, eczema, acne
- Increased CPK (creatine phosphokinase) in the blood, an enzyme that sometimes relates to muscle breakdown, muscle spasms, joint stiffness, joint swelling, muscle weakness, muscle pain
- Urinary incontinence, frequent urination, inability to urinate, painful urination
- Erectile dysfunction, sexual dysfunction
- Loss of menstrual periods or other menstrual cycle problems (women), milk secretion from the breasts, sexual dysfunction, breast pain, breast discomfort
- Swollen face, mouth, eyes, or lips, swollen body, arms, or legs
- Chills, increased body temperature
- Change in the way you walk
- Sensation of sedation
- Chest pain, chest discomfort, sensation of malaise
- Falls
Rare side effects (may affect up to 1 in 1,000 people):
- Eye infection, fungal infection of the nails, skin infection, skin inflammation caused by bacteria
- Pelviclymphopenia (dangerously low count of a type of white blood cell necessary for combat infections)
- Decreased count of a type of white blood cell that helps fight infections, increased eosinophils (a type of white blood cell) in the blood
- Severe allergic reaction characterized by fever, swelling of the mouth, face, lips, or tongue, difficulty breathing, hives, and sometimes decreased blood pressure, anaphylactic reaction
- Increased sugar in the urine
- Incorrect secretion of a hormone that controls urine volume
- Complications of uncontrolled diabetes with risk to life
- Excessive water intake, decreased blood sugar, excessive water intake, increased cholesterol in the blood
- Somnambulism
- Catatonia (lack of movement or response while awake)
- Absence of emotions
- Neuroleptic malignant syndrome (confusion, decreased or lost consciousness, high fever, and severe muscle rigidity)
- Loss of consciousness, balance disorder, coordination abnormality
- Problems in the blood vessels of the brain, coma due to uncontrolled diabetes, decreased response to stimuli, decreased level of consciousness, agitation of the brain
- Glaucoma (increased pressure of the eyeball), increased tear production, eye redness, eye movement problems, eye rotation
- Atrial fibrillation (abnormal heart rhythm), rapid heartbeat when standing up
- Blood clots in the veins, especially in the legs (symptoms include swelling, pain, and redness of the leg), which can travel through the blood vessels to the lungs causing chest pain and difficulty breathing. If you experience any of these symptoms, seek medical advice.
- Decreased oxygen in parts of the body (due to decreased blood flow), flushing
- Respiratory problems during sleep (sleep apnea), rapid breathing, superficial breathing
- Pneumonia caused by aspiration of food, respiratory tract congestion, voice disorder
- Intestinal obstruction, fecal incontinence, hard stools, absence of intestinal movement causing obstruction
- Yellow skin and eyes (ictericia)
- Appendicitis (inflammation of the appendix)
- Severe allergic reaction with swelling, which can affect the throat causing difficulty breathing
- Thickening of the skin, dry skin, skin redness, skin discoloration, scaly and itchy skin on the scalp and face (psoriasis)
- Muscle fiber rupture and muscle pain (rhabdomyolysis), anomaly in the post-mortem examination
- Priapism (prolonged erection that may require surgical treatment)
- Male breast development, increased breast gland size, milk secretion from the breasts, vaginal secretion
- Delayed menstrual periods, increased breast size
- Low body temperature, decreased body temperature
- Withdrawal symptoms from the medication
Unknown (frequency cannot be estimated from available data):
- Lung congestion
- Increased insulin (a hormone that controls blood sugar levels) in the blood
The following side effects have appeared with the use of another medication called risperidone, which is very similar to paliperidone, so it is also expected to appear with paliperidone:
Other types of blood vessel problems in the brain, crepitant sounds from the lungs, severe or potentially fatal skin rash with blisters and peeling of the skin that may start in the mouth, nose, eyes, and genitals and spread to other areas of the body (Stevens-Johnson syndrome/toxic epidermal necrolysis). Eye problems may also occur during cataract surgery. During cataract surgery, a condition called intraoperative floppy iris syndrome (IFIS) may occur if you are taking or have taken paliperidone. If you need to undergo cataract surgery, make sure to inform your eye surgeon if you are taking or have taken this medication.
Additional side effects in adolescents:
Adolescents generally experienced side effects similar to those found in adults, except for the following side effects that were detected more frequently:
- Feeling drowsy or less alert
- Parkinsonism: This disease can include slow or altered movement, a feeling of stiffness or tension in the muscles (causing jerky movements) and sometimes a feeling of "freezing" of movement that then restarts. Other signs of parkinsonism include walking slowly dragging the feet, trembling while descending, increased saliva and/or drooling, and loss of facial expression.
- Weight gain
- Common cold symptoms
- Insomnia
- Tremor (akathisia)
- Abdominal pain
- Milk secretion from the breasts in girls
- Swollen breasts in boys
- Acne
- Speech problems
- Stomach or intestinal infection
- Nosebleeds
- Ear infection
- High triglycerides in the blood (a type of fat)
- Sensation of spinning (vertigo)
Reporting of side effects:
If you experience side effects, consult your doctor, pharmacist, or nurse, even if the side effects do not appear in this prospectus. You can also report them directly to the Spanish System for Pharmacovigilance of Medicines for Human Use:https://www.notificaram.es. By reporting side effects, you can contribute to providing more information on the safety of this medication.