Hydroxychloroquine is a prescription medication and is available through most major pharmacies. To purchase it, you must have a valid prescription from your doctor. Depending on the availability of the drug and local regulations, some countries may require that the medication be obtained through a licensed distributor or pharmacy only. In the United States, hydroxychloroquine is regulated by the Food and Drug Administration (FDA). It is available as an over-the-counter medication in some countries, but should be taken only as prescribed by your doctor.