Renfor 360mg Tablet may increase your chances of certain cancers like skin cancer and lymphoma (cancer of the lymph system). When outside, avoid unnecessary or prolonged exposure to sunlight, wear protective clothing, and apply sunscreen. Call your doctor if you experience a new skin sore or bump, a change in the size or color of a mole, a brown or black skin lesion (sore) with uneven edges, a sore whose one part does not look like the other, skin changes, sores that do not heal, unexplained fever, tiredness that does not go away, weight loss, or pain or swelling in the neck, groin, or armpits.