Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Chloroquine in lepra reaction Can hydroxychloroquine cause pancreatitis Chloroquine 150 mg Find user ratings and reviews for Plaquenil oral on WebMD including side effects and drug interactions, medication effectiveness, ease of use and satisfaction Does Plaquenil Interact with other Medications. drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for. Get medical help right away if you have any very serious side effects, including sensitivity to light, vision changes e.g. blurred vision, seeing light flashes/streaks/halos, missing/blacked-out areas of vision, muscle weakness, numbness/tingling/pain of the arms/legs. Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Hydroxychloroquine is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Plaquenil drug side effects Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses, Plaquenil Oral Interactions with Other Medication Plaquenil 200 mg miamiSide effects of hydroxychloroquine winHow long until plaquenil side effects go away The more common side effects that can occur with hydroxychloroquine include headache. dizziness. diarrhea. stomach cramps. vomiting. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Plaquenil Oral Uses, Side Effects, Interactions, Pictures.. Plaquenil Side Effects Common, Severe, Long Term -. Side-effects aren't common. However, in some people hydroxychloroquine can cause skin rashes, especially those made worse by sunlight. feeling sick nausea or indigestion. diarrhoea. headaches. bleaching of the hair or mild hair loss. tinnitus ringing in the ears More in Eye Health. If you are taking Plaquenil to treat an inflammatory condition or malaria, you should be aware of the side effects that may occur to your eyes and vision. Plaquenil hydroxychloroquine is in a class of drugs called disease-modifying anti-rheumatic drugs, which are used to decrease inflammation, pain and joint damage. Take this medication with a meal or a glass of milk to prevent stomach upset. Common side effects include nausea, loss of appetite, headache, and diarrhea. Plaquenil can cause blurred vision and dizziness. Do not drive or operate heavy machinery until you know how it affects you.