Drug information provided by: IBM Micromedex
Take this medicine exactly as directed by your doctor. 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.
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. This will help you to see how you react to the medicine. Also, it will allow time for your doctor to change to another medicine if you have a reaction to this medicine.
Also, you should keep taking this medicine while you are in the area and for 4 weeks after you leave the area. No medicine will protect you completely from malaria. However, to protect you as completely as possible, it is important to keep taking this medicine for the full time your doctor ordered. Also, if fever develops during your travels or within 2 months after you leave the area, check with your doctor immediately.
If you are taking this medicine to help keep you from getting malaria, keep taking it for the full time of treatment. 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. This will help clear up your infection completely. If you stop taking this medicine too soon, your symptoms may return.
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.
If you are also taking kaolin or antacids, take them at least 4 hours before or after using chloroquine. If you are also taking ampicillin, take it at least 2 hours before or after using this medicine.
The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
For oral dosage form (tablets):
For prevention of malaria:
Adults—500 milligrams (mg) once a week on the same day of each week starting 2 weeks before traveling to an area where malaria occurs, and continued for 8 weeks after leaving the area.
Children—Dose is based on body weight and must be determined by your doctor. The dose is usually 5 milligram (mg) per kilogram (kg) of body weight once per week on the same day each week starting 2 weeks before traveling to an area where malaria occurs, and continued for 8 weeks after leaving the area.
For treatment of malaria:
Adults—At first, 1000 milligrams (mg) once a day. Then, 500 mg 6 to 8 hours after the first dose, and 500 mg on the second and third days of treatment.
Adults with low body weight and children—Dose is based on body weight and must be determined by your doctor. At first, 10 milligram (mg) per kilogram (kg) of body weight. Then, 5 mg per kg of body weight taken 6 hours, 24 hours, and 36 hours after the first dose.
For treatment of liver infection caused by protozoa:
Adults—1000 milligrams (mg) once a day, taken for 2 days. This is followed by 500 mg once a day for at least 2 to 3 weeks.
Children—Use and dose must be determined by your doctor.
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.