Well....both of those are not really recreational drugs, as they are a muscle relaxer and an antihistamine. SOME people find muscle relaxers enjoyable, but not me personally, Benzo's stand high above them in relation to getting "high". But still, some people like the feeling and would spend the cash for em'. I really don't think they are worth anything except for maybe a runny nose or muscle aches...
Man i had some skelaxin and I took two of them and drank and got a great feeling going. They remind me of xanex to a certain extent. Overall i got really fucked up and passed out