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 chloroquine: Incidence not known Some side effects of chloroquine may occur that usually do not need medical attention. Aralen dosage malaria prevention Chloroquine diphosphate structure Serious side effects include problems with vision, muscle damage, seizures, and low blood cell levels. It appears to be safe for use during pregnancy. Chloroquine is a member of the drug class 4-aminoquinoline. It works against the asexual form of malaria inside the red blood cell. Chloroquine was discovered in 1934 by Hans Andersag. INFREQUENT side effects. If experienced, these tend to have a Less Severe expression. Bleached Hair. Discoloration Of Nail. Discoloration Of The Mouth. Feel Like Throwing Up. Hair Loss. Loss Of Appetite. Sep 13, 2019 Along with its needed effects, hydroxychloroquine 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 Incidence not known Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Incidence of adverse affects from chloroquine Chloroquine Warnings and Side Effects - Page 4, Common and Rare Side Effects for Chloroquine Injection What is the difference between plaquenil and hydroxychloroquineChloroquine preparationSymptoms of plaquenil allergyHow long is plaquenil in your system HCQ is generally better tolerated than other antimalarials such as chloroquine. The most common side effects are GI, although patients can also have headaches, tinnitus, itching, and rashes 2. In addition, it is important to note that HCQ can cause retinopathy with prolonged use. Increased Incidence of Gastrointestinal Side Effects in.. Hydroxychloroquine Side Effects Common, Severe, Long Term.. Chloroquine Side Effects Common, Severe, Long Term -. Common, nonocular, side effects of chloroquine and hydroxychloroquine include pruritus, headaches, dizziness, and gastrointestinal upset. Less frequent side effects include discoloration of the oral cavity, nails, skin and hair and rash. Feb 19, 2020 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, Cardiac Effects Cases of cardiomyopathy resulting in cardiac failure, in some cases with fatal outcome, have been reported in patients treated during long term therapy at high doses with Chloroquine see ADVERSE REACTIONS and OVERDOSAGE. Monitor for signs and symptoms of cardiomyopathy and discontinue Chloroquine if cardiomyopathy develops.