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. How much weight loss on plaquenil Chloroquine side effects in children Prescribing hydroxychloroquine for ra Chloroquine syrup dosage for infants The National Center for Biomedical Ontology was founded as one of the National Centers for Biomedical Computing, supported by the NHGRI, the NHLBI, and the NIH Common Fund under grant U54-HG004028. For long-term use, the dose of hydroxychloroquine is usually reduced to 200 mg to 400 mg daily. Malaria The recommended preventative adult dose is 400 mg on exactly the same day of each week, beginning 2 weeks before exposure and continued for 8 weeks after leaving the high-risk area. Hydroxychloroquine Oral tablet 200mg Drug Medication Dosage information. Learn about the reported side effects, related class drugs, and how these medications will affect your daily lifestyle. Visit for more details. If you notice any other effects, check with your healthcare professional. 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. Hydroxychloroquine sulfate oral tablet 200 mg Plaquenil Oral Uses, Side Effects, Interactions., Mylan-Hydroxychloroquine - Uses, Side Effects. What is plaquenil sulfate used for Dosage and Administration. One tablet of 200 mg of hydroxychloroquine sulfate is equivalent to 155 mg base. Malaria Suppression— In adults, 400 mg =310 mg base on exactly the same day of each week. PLAQUENIL® - Food and Drug Administration. Hydroxychloroquine Oral Tablet 200Mg Drug Medication.. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Side Effects. Drug information provided by IBM Micromedex 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. Sep 01, 2019 The molecular weight of hydroxychloroquine sulfate is 433.95, and molecular formula is C 18 H 26 ClN 3 O. H 2 SO 4. Each hydroxychloroquine sulfate tablet intended for oral administration contains 200 mg of hydroxychloroquine sulfate equivalent to 155 mg base. The molecular weight of hydroxychloroquine sulfate is 433.95, and molecular formula is C 18 H 26 ClN 3 O. H 2 SO 4. Hydroxychloroquine sulfate tablets, USP contain 200 mg hydroxychloroquine sulfate, USP equivalent to 155 mg base, and are for oral administration.