oral chemotherapy pills Methotrexate (Rheumatrex™), also developed to fight cancer, is known as the "gold standard" -- the best drug -- for the treatment of rheumatoid arthritis. It has also been shown to be very effective in treating skin lesions, arthritis, and pleuritis in people with lupus. However, the drug can cause sun-sensitivity, liver damage, including cirrhosis, and lung infections. If you are taking this drug you should not drink alcohol, especially if you have a history of kidne...