Greg didn't comment about the meds. He was sure Sherlock did actually need them, but it was no use trying to get him to take them when he was still placing it tough. And, of course, when he wouldn't be able to keep them in his stomach anyway. 
He sat down as Sherlock looked around his own room, as if he had forgotten where he was. 
Watching over him, he took the mug back when Sherlock had finished and set it back on the bedside table. He waited a bit, looking around and trying to think of something else he could do. "Can I do anything for you to.. I don't know, get you to sleep?" he asked. He knew Sherlock played the violin, so he was pretty sure the man liked classical music to a ertain degree. He also couldn't really imagine him liking much different kinds of music. And maybe, he had something that calmed him down? Soothed his nerves or something? Though the fact that Sherlock normally didn't sleep much, made Greg doubt that it.
He wanted to offer to leave the room, to give the detective some privacy, but he wasn't going to do that. He didn't think it would help any to leave the man by himself.