To expect him not to drink tonight?

[Emptyspacex]

Myself and my partner usually have a few drinks together once or twice a week (me glass of wine and him a few beers). I specifically asked him not to drink tonight as our 1 year old has just had his jabs and hes usually feverish and clingy when he has them. We drank last night so it didnt even come into my head to drink tonight especially knowing the baby would be feverish. (Which he already is)

He texted me before leaving work saying im getting some beers so i text back saying please dont. Course he did anyway, i asked him to atleast wait until hes in bed and settled but he just ignored me.

Aibu to ask him not to drink under these circumstances?

I don't think the OP is being U at all in asking her partner and fellow PARENT not to drink on one night, just in case their baby reacts badly to his immunisations and need extra care. It's not like she's trying to ban him from ever drinking again.
No YANBU OP.

But many parents drink a little and are perfectly able to care for their child - sick or not. The issue is whether he was going to drink enough to render that impossible.

Budweiser? Yanbu

17 bottles? Wooh, that’s someone with a problem and isn’t just a “few” beers.

Going off your original post YWBU. It seems an odd reason why you feel you need to insist no drinks. The update does suggest he might have or be beginning to have an issue with alcohol but the request and the reasoning behind it still seems like an excuse.