Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take chloroquine with all of your drugs and health problems. Plaquenil and stomach ulcers Chloroquine heme polymerase Plaquenil 200mg price 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. Call your doctor right away if you have any eyesight changes like blurred or foggy eyesight, trouble focusing or reading, or trouble seeing in dim light. How to use Chloroquine Phosphate. Take this medication by mouth, usually with food to prevent stomach upset, exactly as directed by your doctor. Daily or weekly dosing, dosage amount, and length. Concomitant use of cimetidine should be avoided. Chloroquine phosphate is calculated as the base. Each 250 mg tablet of chloroquine phosphate is equivalent to 150 mg base and each 500 mg tablet of chloroquine phosphate is equivalent to 300 mg base. One tablet of 200 mg of hydroxychloroquine is equivalent to 155 mg base. For all uses of chloroquine: WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Do not start, stop, or change the dose of any drug without checking with your doctor. How to take chloroquine phosphate 500 mg Chloroquine MedlinePlus Drug Information, Chloroquine Phosphate - WebMD Chloroquine po 300 mg daily prophylaxisWithdrawal symptoms of plaquenil Avoid taking an antacid or Kaopectate kaolin-pectin within 4 hours before or after you take chloroquine. Some antacids can make it harder for your body to absorb chloroquine. If you also take an antibiotic called ampicillin, avoid taking it within 2 hours before or 2 hours after you take chloroquine. Chloroquine Uses, Side Effects & Warnings -. CHLOROQUINE PHOSPHATE Aralen, HYDROXYCHLOROQUINE.. Chloroquine Phosphate chloroquine phosphate dose.. Taking chloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Stop taking this medicine and call your doctor at once if you have trouble focusing, if you see light streaks or flashes in your vision, or if you notice any swelling or color changes in your eyes. Medscape - Indication-specific dosing for Aralen, Chloroquine phosphate chloroquine, frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. 500 mg 300 mg base PO at 24 hours & 48 hours after initial dose; Amebiasis, Extraintestinal. The dosage of chloroquine phosphate is often expressed in terms of equivalent chloroquine base. Each 250 mg tablet of chloroquine phosphate is equivalent to 150 mg base. For malaria suppression Adult Dose 500 mg = 300 mg base on exactly the same day of each week.