I developed a rash on my neck with a little on my face at about one month after starting my MAC meds.. My neck was quite swollen. I stopped my MAC meds and took a decreasing dose of prednisone starting at 80mg daily. Took 2 weeks to decrease to being off the steroids. I started back on my MAC meds the next Monday. I am careful to use 50 SPF sunscreen now. No further outbreaks. I also take Benadryl 25mg prior to starting my meds each Mon, Wed and Friday