Hqtor 400 Tablet contains Hydroxychloroquine 400 mg, an antimalarial and immunomodulatory agent primarily used in the treatment and prevention of malaria, as well as autoimmune conditions such as rheumatoid arthritis and systemic lupus erythematosus. Hydroxychloroquine acts by interfering with lysosomal activity and autophagy in immune cells, thereby reducing inflammation and modulating the immune response. This medication is indicated for the management of acute and chronic malaria caused by Plasmodium species and for controlling symptoms and disease progression in autoimmune disorders. Hqtor 400 Tablet should be administered under medical supervision, with dosage tailored according to the specific condition and patient response. Common side effects may include gastrointestinal disturbances, headache, dizziness, and skin rash. Serious adverse effects, although rare, can involve retinopathy, cardiomyopathy, and hematological abnormalities, necessitating regular monitoring, including ophthalmologic examinations during prolonged therapy. Caution is advised in patients with pre-existing retinal or cardiac conditions, and it is contraindicated in individuals with hypersensitivity to hydroxychloroquine or related compounds. Use during pregnancy and lactation should be carefully considered against potential risks and benefits. Patients should be advised to report any visual changes or unusual symptoms promptly to their healthcare provider.