If you drink Omeluum’s potion before using any tadpole powers, it still does nothing beneficial in terms of curing the parasite. The game treats it as an attempt to weaken the tadpole, but the potion fails, so you don’t get cured and you don’t get a debuff from it either.

What it means in-game

  • You can drink it even if you have not unlocked any Illithid powers yet.
  • It does not require prior tadpole power use to work or fail.
  • The result is basically the same either way: Omeluum apologizes, and you move on with no real mechanical gain from the potion itself.

Important detail

Some players worry it might count as “using tadpoles,” but the common guidance is that the potion does not trigger the special tadpole-related choice later on; that check is tied to actually consuming tadpoles to unlock powers.

Practical takeaway

If your goal is to stay completely away from Illithid powers, drinking Omeluum’s potion does not force you into them. If your goal is to get an actual cure, the potion won’t provide one.

TL;DR: nothing dramatic happens — it’s safe to drink early, but it fails to cure you and doesn’t give you anything useful.