DM's can allow players to craft healing potions, similar to crafting an item. Player's should be required to have the alchemist's supplies proficiency and the associated tool kit. Xanathar's Guide to Everything does not specifiy that any skill check needs to be made for crafting a healing potion (we can assume that the time it takes to brew these potions allows for issues to get resolved during the process). Xanathar's Guide to Everything also suggests that a "complications may occur" every 5 workweeks, but since the longest it takes for a potion to be created is 4 workweeks, then a complication shouldn't exist (DM Discretion). Below is a table, as described in that shows the time and costs for each potion.
Potion of Healing Creations
| Potion Type | Time | XGtE Cost | XGtE Sale Price | Sane Costs | Sane Sale Price |
|---|---|---|---|---|---|
| Healing | 1 day | 25 gp | 50 gp | 25 gp | 50 gp |
| Greater Healing | 1 workweek | 100 gp | 200 gp | 100 gp | 200 gp |
| Superior Healing | 3 workweeks | 1,000 gp | 2,000 gp | 250 gp | 500 gp |
| Supreme Healing | 4 workweeks | 10,000 gp | 20,000 gp | 1,000 gp | 2,000 gp |