Here's an idea:
Make Nuke-Cola work like food, but at the same time, it should be addicting, basically be a light drug (depending on your drug perks). In case it will grant healing or such, make it so you can only drink one NUKE COLA before its effect disappears.
Example :
8 hp regen (1 more than food, but you are limited to 1 nuke cola per use)
~1-5 radiation per use (Not sure exactly how much radiation is too much now)
- IT should also fill 1 food slot.
So basically 0/4 food.
You eat 3 fruit and drink one cola(You can max drink 1 cola, having to wait for its effect to expire, this is obviously for balance assuming it will do more than 5hp/10kg). You get 4/4.
Stats will be :
30 extra carry KGs.
23 Hp regen
~radiation increased~ - this should combat the extra HP regen, which on the long run it'll hurt if "abused".
This is just an example, might be a bad one but someone with more experience could come with something better. It should definitely be a light drug and cause addiction due to what it contains (The nuke cola) that is. But it should also not replace food items and be like an enchantment you can take or skip, having the drug drawback.