Chloroquine Phosphate Side Effects
What should I watch for?
Tell your doctor or health care professional if your symptoms do not start to get better or if they get worse.
Avoid taking antacids and kaolin within 4 hours of taking this medicine. It is best to separate these medicines by at least 4 hours.
Tell your doctor or health care professional right away if you have any change in your eyesight.
Your vision and blood may be tested before and during use of this medicine.
This medicine can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and use sunscreen. Do not use sun lamps or tanning beds/booths.
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:
Incidence not known
attempts at killing oneself
back, leg, or stomach pains
black, tarry stools
blistering, peeling, or loosening of the skin
blood in the urine or stools
blurred or decreased vision
change in near or distance vision
chest discomfort or pain
continuing ringing or buzzing or other unexplained noise in the ears
difficulty in focusing the eyes
difficulty with speaking
difficulty with swallowing
disturbed color perception
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
fast, slow, irregular, or pounding heartbeat
feeling that others are watching you or controlling your behavior
feeling that others can hear your thoughts
feeling, seeing, or hearing things that are not there
general tiredness and weakness
halos around lights
inability to move the eyes
increased blinking or spasms of the eyelid
joint or muscle pain
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
loss of balance control
lower back or side pain
muscle trembling, jerking, or stiffness
overbright appearance of lights
painful or difficult urination
pinpoint red spots on the skin
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
red skin lesions, often with a purple center
red, irritated eyes
sores, ulcers, or white spots on the lips or in the mouth
sticking out of the tongue
stiffness of the limbs
swollen or painful glands
tightness in the chest
twitching, twisting, or uncontrolled repetitive movements of the tongue, lips, face, arms, or legs
uncontrolled movements, especially of the face, neck, and back
unusual bleeding or bruising
unusual tiredness or weakness
upper right abdominal or stomach pain
yellow eyes and skin
Get emergency help immediately if any of the following symptoms of overdose occur:
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:
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.