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. Can plaquenil help with hot flashes Can ranitidine be taken with plaquenil The side effects featured here are based on those most frequently appearing in user posts on the Internet. The manufacturer's product labeling should always be consulted for a list of side effects most frequently appearing in patients during clinical studies. Talk to your doctor about which medications may be most appropriate for you. Tell your doctor if you have ever had vision changes while taking chloroquine phosphate, chloroquine hydrochloride Aralen HCl, or hydroxychloroquine Plaquenil. tell your doctor if you are pregnant or plan to become pregnant. If you become pregnant while using chloroquine phosphate, call your doctor. Some of the more commonly reported side effects with Aralen include headache, loss of appetite, and vomiting. Because this is an older medication, only vague information is available on how frequently side effects occur. Be aware of potentially serious reactions during treatment, such as a rash or vision problems. If you notice any other effects, check with your healthcare professional. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them: Other side effects not listed may also occur in some patients. Side effects from aralen Gabapentin Oral Route Side Effects - Mayo Clinic, Chloroquine MedlinePlus Drug Information Hydroxychloroquine 200mg twice a dayPlaquenil dosage formsPlaquenil dental concernsIs plaquenil an anti inflammatoryPlaquenil cholesterol Aralen chloroquine phosphate is an antimalarial drug used to treat and to prevent malaria. It is also used to treat infections caused by amoebae. Aralen is available in generic form. Common side effects of Aralen include blurred vision, nausea, vomiting, abdominal or stomach cramps, headache, diarrhea, temporary hair loss, changes in hair color, or Side Effects of Aralen Chloroquine, Warnings, Uses. Aralen Side Effects - Drugs Home Page. Aralen Side Effects Common, Severe, Long Term -. To do so may increase the chance of serious side effects. For patients taking chloroquine to prevent malaria Your doctor will want you to start taking this medicine 1 to 2 weeks before you travel to an area where there is a chance of getting malaria. Side effects Most people do not experience side effects from taking Aralen. Among those who do, common side effects include blurred vision, nausea, stomach cramps, vomiting, dizziness, headaches, and diarrhea. These side effects often decrease over time. If your side effects worsen, contact your doctor. Aralen can cause serious, irreversible eye damage. Some side effects 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.