Invega Side Effects
What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. It may be several weeks before you see the full effects. Do not suddenly stop taking this medicine. You may need to gradually reduce the dose. Only stop taking this medicine on the advice of your doctor or health care professional.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
This medicine can reduce the response of your body to heat or cold. Dress warm in cold weather and stay hydrated in hot weather. If possible, avoid extreme temperatures like saunas, hot tubs, very hot or cold showers, or activities that can cause dehydration such as vigorous exercise.
The tablet shell for some brands of this medicine does not dissolve. This is normal. The tablet shell may appear whole in the stool. This is not a cause for concern.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Difficulty with speaking
fast, pounding, or irregular heartbeat or pulse
increase in body movements
loss of balance control
muscle trembling, jerking, or stiffness
stiffness of the limbs
twisting movements of the body
uncontrolled movements, especially of the face, neck, and back
difficulty with swallowing
excessive muscle tone
inability to move the eyes
increased blinking or spasms of the eyelid
increased blood pressure
muscle tension or tightness
pain in the arms or legs
sticking out of the tongue when not meaning to
tic-like (jerky) movements of the head, face, mouth, and neck
trembling and shaking of the fingers and hands
trouble with breathing, speaking, or swallowing
uncontrolled twisting movements of the neck, trunk, arms, or legs
unusual facial expressions
unusual tiredness or weakness
Incidence not known
Decrease in the frequency of urination
decrease in urine volume
difficulty in passing urine (dribbling)
large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
lip smacking or puckering
painful or prolonged erection of the penis
puffing of cheeks
rapid or worm-like movements of the tongue
uncontrolled chewing movements
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Absent, missed, or irregular menstrual periods
difficulty having a bowel movement
fear or nervousness
inability to sit still
need to keep moving
sleepiness or unusual drowsiness
stopping of menstrual bleeding
changes in appetite
lack or loss of strength
stomach discomfort or upset
stuffy or runny nose
swelling or soreness of the breasts in both females and males
unexpected or excess milk flow from breasts
upper stomach pain
Incidence not known
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.