Omeluum, a Mind Flayer in the Underdark in Act One of Baldur's Gate 3, will attempt to remove the Illithid tadpole that has taken up residence in your brain. To do so, he will offer you a potion. Whether or not you should trust and drink Omeluum's potion in BG3 depends on your goals.

In short, yes, you should drink Omeluum's potion in BG3 because it won't harm you. However, drinking the potion has a side effect: the Illithid tadpole that resides in your mind will become stronger.

Depending on your goals in BG3, drinking Omeluum's Potion may or may not be the same. But it doesn't have to be. The easiest way to decide whether or not to drink Omeluum's Potion is to ask yourself the following questions:

The best decision would be to choose the option that suits your goals. However, like all good things, there is a long-term consequence to strengthening your Illithid Powers. While it is beneficial in that it allows you to use Illithid Powers, the parasite will continue to grow and eventually consume your character, turning them into a Mind Flayer.