Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Can you take antibiotics with hydroxychloroquine Decreased libido plaquenil Nausea, vomiting, and diarrhoea are common side effects, but are usually transient or resolve on the reduction of the dose. They can be minimised by taking the hydroxychloroquine with food. Cutaneous effects. Blue–grey pigmentation of the skin affects up to 25% of patients taking hydroxychloroquine, especially where there has been bruising. Some side effects of hydroxychloroquine 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. The more common side effects that can occur with hydroxychloroquine include headache. dizziness. diarrhea. stomach cramps. vomiting. Hydroxychloroquine may also be used for purposes not listed in this medication guide. Hydroxychloroquine is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Side effects of hydroxychloroquine 400 mg Hydroxychloroquine Oral Uses, Side Effects, Interactions, Pictures., Hydroxychloroquine Side Effects Common, Severe, Long Term - Hydroxychloroquine tabletsDoes chloroquine interact with vitamins Side effects Severe self harm thoughts or urges, irritability, reactive depression, weight gain, uncontrollable crying, unrefreshing or poor sleep Evaluations from Patients who take Hydroxychloroquine.. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Hydroxychloroquine Oral Uses, Side Effects, Interactions.. Call your doctor immediately or get emergency medical help if you experience any of the following serious side effects Any vision problems, such as reading difficulties, sensitivity to light, seeing light flashes or streaks, blurred distance vision, or other issues Hearing problems. The most common side effects are diarrhea, nausea, vomiting, headache, dizziness, skin rash or black spots when you look at things. Most side effects will go away when your body gets used to the medicine. Tell your doctor if you have these side effects. A lower dose may stop them. Do not lower the dose on your own. Side-effects aren't common. However, in some people hydroxychloroquine can cause skin rashes, especially those made worse by sunlight; feeling sick nausea or indigestion; diarrhoea; headaches; bleaching of the hair or mild hair loss; tinnitus ringing in the ears visual problems.