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 while taking hydroxychloroquine: Incidence not known Some side effects of hydroxychloroquine may occur that usually do not need medical attention. Hydroxychloroquine sulfate rheumatoid arthritis Can hydroxychloroquine affect synthroid absorption Plaquenil side Effcts stomach problems with topamax Stomach pain, burping, swollen tongue. stomach pain associated with lithium Severe stomach pains, back pain, etc. Upper Stomach Pain, Nausea & Burning of the Stomach swollen feet and plaquenil bad stomach pains Keppra and stomach/abdominal pain Stomach pain from Fasomax Constant Stomach Pain. Plaquenil is not effective against chloroquine or hydroxychloroquine-resistant strains of Plasmodium species see CLINICAL PHARMACOLOGY – Microbiology. Plaquenil is not recommended for the treatment of malaria acquired in geographic areas where chloroquine resistance occurs or when the Plasmodium species has not been identified. Plaquenil is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Plaquenil is available in generic form. What Are Side Effects of Plaquenil? Common side effects of Plaquenil include. nausea, vomiting, stomach pain or cramps, loss of appetite, weight loss, diarrhea, dizziness, spinning sensation. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Plaquenil stomach problems Plaquenil hydroxychloroquine Basics, Side Effects., Plaquenil - FDA prescribing information, side effects and uses Hydroxychloroquine wartsSide effects of plaquenil on eyesChloroquine and doxycycline similar drugsHydroxychloroquine side efects Side Effects Nausea, stomach cramps, loss of appetite, diarrhea, dizziness, or headache may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Remember. Plaquenil Oral Uses, Side Effects, Interactions.. Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses. Plaquenil Hydroxycholorquine - Arthritis - MedHelp. Some of the dosage forms listed on this page may not apply to the brand name Plaquenil. For the Consumer. Applies to hydroxychloroquine oral tablet. Along with its needed effects, hydroxychloroquine the active ingredient contained in Plaquenil may cause some unwanted effects. Although not all of these side effects may occur, if they do occur. I have a problem. I was diagnosed on October 14, 2013 with UCTD. The Rheumatologist put me on Plaquenil. I started with just one pill per day because I sometimes have side effects from new drugs. After just 4 days on Plaquenil, I had severe stomach cramps, no appetite, GERD pain, diarrhea and a migraine. HI, sorry to hear about your various troubles, the drug of choice that you describe in terms of brand is Plaquenil, it seems to give less problems, “HYDROXYCHLOROQUINE SULPHATE ZENTIVA 200MG FILM COATED” and the ‘PIP number’ Product Code is 1201730.