Olanzapine 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 of this medicine. Notify your doctor or health care professional if your symptoms get worse, if you have new symptoms, if you are having an unusual effect from this medicine, or if you feel out of control, very discouraged or think you might harm yourself or others.
Do not suddenly stop taking this medicine. You may need to gradually reduce the dose. Ask your doctor or health care professional for advice.
You may get dizzy or drowsy. 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.
Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water will help.
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.
If you notice an increased hunger or thirst, different from your normal hunger or thirst, or if you find that you have to urinate more frequently, you should contact your health care provider as soon as possible. You may need to have your blood sugar monitored. This medicine may cause changes in your blood sugar levels. You should monitor you blood sugar frequently if you have diabetes.
If you smoke, tell your doctor if you notice this medicine is not working well for you. Talk to your doctor if you are a smoker or if you decide to stop smoking.
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:
Bloating or swelling of the face, arms, hands, lower legs, or feet
change in vision
change in walking and balance
clumsiness or unsteadiness
difficulty with speaking
difficulty with swallowing
inability to sit still
loss of balance control
muscle trembling, jerking, or stiffness
need to keep moving
rapid weight gain
stiffness of the arms and legs
tic-like (jerky) movements of the head, face, mouth, and neck
tingling of the hands or feet
trembling or shaking of the fingers, hands, feet, legs, or arms
twisting movements of the body
uncontrolled movements, especially of the face, neck, and back
unusual weight gain or loss
bloody or cloudy urine
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
difficult or labored breathing
difficult, burning, or painful urination
excessive muscle tone
frequent urge to urinate
inability to move the eyes
increased blinking or spasms of the eyelid
itching of the vagina or genital area
lack of coordination
large, flat, blue, or purplish patches in the skin
loss of bladder control
loss of memory
lower back or side pain
muscle tension or tightness
pain during sexual intercourse
pounding in the ears
problems with memory
rhythmic movement of the muscles
slow, fast, pounding, or irregular heartbeat or pulse
speaking is less clear than usual
sticking out the tongue
thick, white vaginal discharge with no odor or with a mild odor
tightness in the chest
uncontrolled twisting movements of the neck, trunk, arms, or legs
unusual or incomplete body or facial movements
weakness of the arms and legs
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:
Acid or sour stomach
change in personality
difficulty having a bowel movement (stool)
feeling sad or empty
lack of appetite
lack or loss of strength
loss of interest or pleasure
stomach discomfort, upset, or pain
trouble with concentrating
watering of the mouth
Blemishes on the skin
body aches or pain
dryness or soreness of the throat
false or unusual sense of well-being
heavy menstrual bleeding (periods)
lack of feeling or emotion
pain in the arms or legs
tender, swollen glands in the neck
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.