Folitrax 15 Tablet contains Methotrexate, a disease-modifying antirheumatic drug (DMARD) used to treat various autoimmune conditions such as rheumatoid arthritis, psoriasis, and certain types of cancer. Methotrexate works by inhibiting the enzyme dihydrofolate reductase, which is necessary for the synthesis of DNA, RNA, and proteins, thereby suppressing the overactive immune system and slowing down the rapid growth of cells. In rheumatoid arthritis and psoriasis, it helps reduce inflammation and prevents joint and skin damage. Common side effects include nausea, vomiting, mouth ulcers, and fatigue. Due to its potential toxicity, Folitrax must be taken exactly as prescribed, and regular monitoring by a healthcare provider is necessary to check for any adverse effects on the liver, kidneys, and blood cells.