Manuscript page: Enhanced Swallow is an alchemy formula in The Witcher 3: Wild Hunt that is needed to craft Enhanced Swallow.
It's a possible spawn at a random diagram location starting at level 10, or purchased from the following merchants:
- Herbalist in a shop in Glory Lane
- Otto Bamber at the Herbalist's Hut northeast of Oxenfurt
- Yolar at Gedyneith
- All alchemists and herbalists in Toussaint, except Pinastri
