My husband got his first Rx (55yo), it sat unused for a couple weeks, then I noticed that one was gone. He said he took it "last week" and we both sat on the couch falling asleep, we went upstairs and slept. He said he wanted to see what the effect would be. Is it possible that there was no effect if he was tired and did not make a move on me? (Or do I have a problem on my hands?)