Is one of those situations where you can't decide on an appropriate gift 'for the person that has everything'?
Or is it adjuvant treatment?
Adjuvant
In pharmacology, an adjuvant is a drug or other substance, or a combination of substances, that is used to increase the efficacy or potency of certain drugs. Specifically, the term can refer to: Adjuvant therapy in cancer management Analgesic adjuvant in pain management Immunologic adjuvant in vaccines Wikipedia