Does Adderall affect your immune system?

Possibly. See http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12120898&dopt=Abstract, which is a study showing that with short-term and long-term administration of amphetamine in mice at the dosage of 1mg/kg, the immune system response was notably lowered in several areas