Hydroxychloroquine is a medicine that started out as a treatment for malaria. Over time doctors found it helps with some autoimmune diseases, like lupus and rheumatoid arthritis. During the COVID‑19 pandemic it got a lot of attention, but it’s still mainly prescribed for the original uses.
When a doctor prescribes hydroxychloroquine, they’ll give a dosage that fits your weight, age and condition. For malaria prevention the dose is usually a low tablet taken once a week. For lupus or arthritis the dose can be higher, often split into two daily pills. Always take the medicine with food or a glass of water to reduce stomach upset.
If you miss a dose, take it as soon as you remember—unless it’s almost time for the next dose. In that case, just skip the missed one and continue as usual. Don’t double up; too much can cause serious heart issues.
Most people feel fine, but some experience mild symptoms like nausea, headache or a skin rash. These usually go away after a few days. More serious side effects include blurry vision, heart rhythm changes, or severe skin reactions. If you notice any vision changes, chest pain, or an unusual rash, stop the medicine and contact a healthcare professional right away.
Regular eye exams are important because hydroxychloroquine can affect the retina over long‑term use. Your doctor will likely schedule a check‑up every year if you stay on the drug for months or years.
Because the drug can interact with other medicines—especially those that affect heart rhythm—always tell your pharmacist about every prescription, over‑the‑counter drug, and supplement you’re taking.
Pregnant or nursing women should discuss risks with their doctor. In most cases the benefits outweigh the risks, but a professional opinion is essential.
Hydroxychloroquine isn’t a cure‑all. While early studies looked at it for COVID‑19, larger trials showed it doesn’t help most patients and can cause harm if used incorrectly. Stick to the uses approved by your doctor.
In short, if you have a prescription for hydroxychloroquine, follow the dosing schedule, watch for side effects, keep up with eye exams, and stay in touch with your healthcare team. Doing those simple steps makes the medicine work safely and effectively.
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