HCQS 300 Tablet is used to treat autoimmune conditions such as rheumatoid arthritis and systemic lupus erythematosus. It slows the disease's progression and relieves pain, swelling, and redness. It is also used in patients with type 2 diabetes mellitus to improve glycemic control. HCQS 300 Tablet should be taken with food. This will prevent you from getting an upset stomach upset. You should take it regularly and at the same time each day to get the maximum benefit from it. Keep taking it as recommended by your doctor and complete the dose even if you feel better. The common side effects of this medicine include blurred vision and increased sensitivity to light. It may even change the color of your eyes. Consult with your doctor if any of these side effects do not go away with time or get worse. Your doctor may help with ways to reduce or prevent these symptoms. To make sure the medicine is safe for you, before taking this medicine, let your doctor know if you have any problems with your heart, kidneys, or liver. Also, tell your doctor about all the other medicines you are taking. Your doctor may recommend regular eye tests to check your vision while on this medication. Pregnant and breastfeeding mothers should consult with their doctors before taking the medicine.