“I looked her up,” Fayez said. “I didn’t tell Elvi. Back in the day, this was Francisca Torrez. She worked in the Science Directorate as a technician. I assume Cortázar knew her, at least in passing. She was going through something. Maybe her love life sucked. Maybe she always wanted to be a dancer and realized it wasn’t happening for her. Anyway, she started drinking and showed up to work intoxicated and belligerent. She didn’t even go home that day. Ochida had a streamlined disciplinary hearing with Cortázar and the head of security, and they put her in the Pen before she even sobered up.” - Leviathan Falls

Tanaka in the same book had it available in her bedsite table:

“First I’ve heard of it,” she said, reaching for the side table and her sobriety meds. “Can you tell me the agenda?” - Leviathan Falls

We know that sobriety meds were wildly available at least by Babylon's Ashes

Alex held it up. He’d gotten the packet from a dispenser in the men’s room. The foil had a dragon’s head embossed on it and some nonsense kanji that didn’t mean anything.

Holden’s brow furrowed. “Sobriety meds?”

Alex felt himself blushing and tried to hide it by smiling. “Well, I’m thinking I may be in a situation here pretty soon where everybody needs to be able to agree to whatever they’re agreeing to.” - Babylon's Ashes

So how did a scientist assigned to a high level research facility not have access to the sobriety drugs? Does Laconia not make them wildly available in the hopes that they can recruit more people into the pens? For a high security building like the pens I'd assume it would be in dispensing machines in the bathrooms for when you clock into work.