Any mod that add new items, such as food, drugs and clothing are automatically disabled in stockpiles. Colonists will ignore them and they will not haul or wear items due to the fact that categories have them disabled. Not only this, some items may not be used by your pawns due to restrictions also disabling them.

The solution for this in general is to enable the items in your save.

Make sure:
- Items in general, medical or etc. are enabled in stockpiles
- Clothing items are also enabled in outfit settings so pawns will wear them.
- Food items are enabled in food restriction settings so pawns will eat them.
- Drugs are enabled in drug restriction settings, if you don't see the new drug you have to make a new drug policy and the newly added drug item with whatever mod it is will now appear.