I don't think a lot of the repliers got the reference.

Or it's Leland. He took the glass to divert suspicion, but not even a sip. The whole scene at the hospital was him reminding everyone that he almost got poisoned too! (I have not watched ahead. )

He's worried that anyone who knows becomes a target. Claire was kidnapped and beaten because she was seen with him.

It looks more like he just hired someone to stock his closet for him.

No love for your Six Feet Under reference. I got it!

I see the confusion. Fasinex is an actual thing. Gasinex is not, but it's obviously a gas-relief med like Gas-X.