My husband developed a severe Lenalidomide/Revlimid rash. His oncologist reduced the dose, and added a cocktail to be taken with each dose - the cocktail is one L-Lysine pill, one regular Claritin, and two 20 mg Pepcid pills. Now Revlimid can be taken with no rash. These three over the counter meds have essentially no side effects. It may be worth discussing with your doctor.