This can damage many parts of the body, including the joints, skin, kidneys, heart, lungs, blood vessels, and brain. There are several kinds of lupus The cause of lupus is unknown. Lupus is two to three times more common in African American women than in Caucasian women. Plaquenil side effects stomach pain Chloroquine diphosphate salt storage 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. Chloroquine phosphate may cause an upset stomach. Take chloroquine phosphate with food. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use chloroquine phosphate exactly as directed. Do not use more or less of it or use it more often than prescribed by your. Pharmacokinetics Following a single 200 mg oral dose of hydroxychloroquine sulfate tablets to healthy males, the mean peak blood concentration of hydroxychloroquine was 129.6 ng/mL, reached In 3.26 hours with a half-life of 537 hours 22.4 days. African American and Hispanic women are more likely to have severe forms of lupus. It's also more common in Hispanic, Asian, and Native American women. Hydroxychloroquine medline plus Hydroxychloroquine - Wikipedia, Chloroquine MedlinePlus Drug Information Plaquenil and optic neuropathyChloroquine malaria life cycle treatment Find information on health conditions, wellness issues, and more in easy-to-read language on MedlinePlus, the up-to-date, trusted health information site from the NIH and the National Library of Medicine. MedlinePlus. DailyMed - HYDROXYCHLOROQUINE SULFATE tablet, film coated. DailyMed - PLAQUENIL- hydroxychloroquine sulfate tablet. Hydroxyzine comes as capsules, tablets, a syrup, and suspension to take by mouth. It usually is taken three or four times a day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. The most severe form of color blindness is achromatopsia. This is a rare condition in which a person cannot see any color, only shades of gray. Most color blindness is due to a genetic problem. About 1 in 10 men have some form of color blindness. Very few women are color blind. The drug hydroxychloroquine Plaquenil can also cause color blindness. Leflunomide may harm the fetus. You should not begin taking leflunomide until you have taken a pregnancy test with negative results and your doctor tells you that you are not pregnant. You must use an effective method of birth control before you begin taking leflunomide, during your treatment with leflunomide, and for 2 years after treatment.