Lefunol-20 Tablet is a medication used to treat rheumatoid and psoriatic arthritis, providing relief from pain, swelling, and redness. It can be taken with or without food, and should be taken regularly. Common side effects include nausea, headache, dyspepsia, rash, diarrhea, and increased liver enzymes. Before taking the medication, inform your doctor about any heart, kidney, or liver problems, and any other medications you are taking. Pregnant and breastfeeding mothers should consult their doctors.