My husband just came from the 3 day hospital stay where he was placed on the drug "tikosyn 500milliliters. We are home but he has a headache. I was reading over all of the possible drugs that are not to be taken that will inter act with this drug. He is taking Digoxin, which shows up on this list of over 500 drugs that may interact. Just trying to find all of the answers. I also put 1% hydrocortisone on his back that was itching where he was shocked. and now I see this is on the list, unless the question mark signs may just mean potential side effects.