Ouch. He’s definitely trying to lean into that "medicine cabinet" humor. It’s a clever enough jab, but since your name literally is the generic for Dramamine, you might as well lean into the chemistry of it.

Here are a few ways to flip the script, depending on how much "edge" you want to give back:

The "High Ground" Approach
"Funny. But unlike your jokes, I actually prevent people from getting sick."

"At least I’m effective. You’re more like a placebo—zero impact, just a lot of talk."

The Witty & Technical Flex
"I’m an H1 antagonist. I’m literally biologically engineered to block people like you."

"Glad you can read a label. Now see if you can read the room."

The Short & Sharp (The "Burn")
"Better to put people to sleep than to make them wish they were unconscious, like you do."

"You’re the reason I have to exist; you're a walking case of motion sickness."

My Personal Favorite:

"If I'm Dramamine, you're the nausea. I’m just here to clear you out."

Which vibe fits the situation better—do you want to