Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. To do so may increase the chance of serious side effects. Hydroxychloroquine long term side effects Hydroxychloroquine and myasthenia gravis Chloroquine works best when you take it on a regular schedule. For example, if you are taking it once a week to prevent malaria, it is best to take it on the same day of each week. Make sure that you do not miss any doses. If you have any questions about this, check with your doctor. Chloroquine is a prescription medication used to prevent and treat is also used to treat amebiasis an infection caused by the parasite Entamoeba histolyticamedication belongs to a group of drugs called antimalarials and amebicides. Chloroquine belongs to a group of medicines known as antimalarials. It works by preventing or treating malaria, a red blood cell infection transmitted by the bite of a mosquito. However, this medicine is not used to treat severe or complicated malaria and to prevent malaria in areas or regions where chloroquine is known not to work resistance. If you already have malaria, you should still keep taking this medicine for the full time of treatment even if you begin to feel better after a few days. If you stop taking this medicine too soon, your symptoms may return. If you are taking this medicine to help keep you from getting malaria, keep taking it for the full time of treatment. Chloroquine phosphate overdose Massive chloroquine overdose--a survivor., Chloroquine - Side Effects, Uses, Dosage, Overdose. Plaquenil vision testingHydroxychloroquine lupus nephritis Irreversible retinal damage observed in some patients; significant risk factors for retinal damage include daily doses of chloroquine phosphate 2.3 mg/kg of actual body weight, durations of use greater than five years, subnormal glomerular filtration, use of some concomitant drug products such as tamoxifen citrate, and concurrent macular disease. Aralen, Chloroquine phosphate chloroquine dosing.. What is Chloroquine Phosphate? - GoodRx. Is Chloroquine a Cure for Coronavirus? Scientists Say Maybe.. The dose of chloroquine is often expressed or calculated as the base each 500 mg tablet of chloroquine phosphate is equivalent to 300 mg chloroquine base. -The pediatric dose should never exceed the adult dose. A severe eye problem has happened with chloroquine. This may lead to lasting eyesight problems. The risk may be higher if you have some types of eye or kidney problems. The risk may also be higher with some doses of chloroquine, if you use chloroquine for longer than 5 years, or if you take certain other drugs like tamoxifen. The dosage of chloroquine phosphate is often expressed or calculated as the base. Each 250 mg tablet of chloroquine phosphate is equivalent to 150 mg base. In infants and children the dosage is preferably calculated on the body weight. Malaria Suppression— Adult Dose 500 mg = 300 mg base on exactly the same day of each week.