It may have both an anti-spirochaete activity and an anti-inflammatory activity, similar to the treatment of rheumatoid arthritis. And caution is required if patients have certain heart conditions, diabetes, psoriasis etc. How long does it take plaquenil to work Dermatomyositis rash and plaquenil 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. Some side effects of chloroquine may occur that usually do not need medical attention. 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. Tell your doctor if you experience serious side effects of Plaquenil including. muscle weakness, twitching, uncontrolled movement, loss of balance or coordination, blurred vision, light sensitivity, seeing halos around lights, The most serious adverse effects affect the eye, with dose-related retinopathy as a concern even after hydroxychloroquine use is discontinued. The most common adverse effects are a mild nausea and occasional stomach cramps with mild diarrhea. Chloroquine sulphate 200mg side effects Hydroxychloroquine Uses, Dosage & Side Effects -, Chloroquine Side Effects Common, Severe, Long Term. Plaquenil and lovenoxChloroquine salt What are the potential side effects of hydroxychloroquine? Hydroxychloroquine is a relatively well tolerated medicine. The most common adverse reactions. reported are stomach pain, nausea, vomiting, and headache. These side effects can often be lessened by taking hydroxychloroquine with food. Hydroxychloroquine may also cause itching in some people. Medicines for the Prevention of Malaria While Traveling.. Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses. Chloroquine Oral Route Side Effects - Mayo Clinic. Hydroxychloroquine sulfate tablets, USP are white, to off-white, capsule-shaped tablets, debossed "HCQS" on one side and plain on the reverse side and are available in bottles of 10, 100, 5. Each tablet contains 200 mg hydroxychloroquine sulfate, USP equivalent to 155 mg base. Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects. diarrhea. dizziness. hair loss. headache. increased skin sensitivity to sunlight. loss of appetite. Hydroxychloroquine is available in generic forms and under the brand names of Plaquenil in tablets of 200 mg. The usual dose is 400 mg daily in one or two divided doses. Common side effects include headaches, dizziness, gastrointestinal upset and rash.