Salvestrols are a food supplement and should not interfere with drug therapies unless such therapies restrict intake of the fruit sources listed on the product label. Please note that salvestrol products do not contain naringenin, a compound commonly found in grapefruit which may interact with several CYP enzymes and could therefore interfere with some drug therapies.
If you are uncertain, stop using salvestrols several days prior to treatment and do not continue their use until several days after treatment has finished.