Hydroxychloroquine is available as the brand-name drug Plaquenil. Generic drugs usually cost less than the brand-name version. Hydroxychloroquine may be used as part of a combination therapy. Adverse reactions to chloroquine Hydroxychloroquine for skin rash Side effects of long term plaquenil use Plaquenil is the newest & safest in the class. The drug helps with skin rashes, hair loss, mouth ulcers, joint pain & swelling, fatigue, etc. It takes perhaps 3-4 months to build up & reach full effect. GOOD NEWS hair loss & weight gain are NOT associated with Plaquenil. When cut, too much of the drug can be released at once and cause a reaction or side effects. When prescribed 300 mg. daily, you should alternate one tablet one day with two the next. I've been on Plaquenil for almost four years now and it's helped me a lot. 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. Hydroxychloroquine is used to treat lupus erythematosus and rheumatoid arthritis. It isn’t fully understood how this drug works to treat lupus erythematosus or rheumatoid arthritis. That means you may need to take it with other drugs. It treats malaria by killing the parasites that cause the disease. Plaquenil side effects tired Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses, Plaquenil side effects - Scleroderma - Inspire Relapse of plasmodium vivax after chloroquineCan i take aleve with plaquenilWhat is plaquenil used to treatCan you take plaquenil with protonix Sep 13, 2019 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 they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine Plaquenil Side Effects Common, Severe, Long Term -. Plaquenil Oral Uses, Side Effects, Interactions, Pictures.. Long-Term Side Effects of Plaquenil for Rheumatoid Arthritis.. Hydroxychloroquine Plaquenil is a drug that is classified as an anti-malarial drug. Plaquenil is prescribed for the treatment or prevention of malaria. It is also prescribed for the treatment of rheumatoid arthritis, lupus, and the side effects of lupus such as hair loss, joint pain, and more. Side effects In some people, HCQ may cause gastrointestinal problems, such as nausea, vomiting, upset stomach, cramps, or diarrhea. These may occur for the first few days a person takes the drug while the body adjusts to the medication. 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.