As it is, we are able to create wands and scrolls of the Inflict line of spells, but not Brew them.
I realize that this is a very niche suggestion, but since the highest you would be able to brew would be innate level 3 (Inflict Serious Wounds), it doesn't feel like it would be out of line, and more just mild QoL for some races. It would also be another low level option for healing undead summons while levelling if you do not happen to have the carry capacity for healing kits, access to wands, etc. yet.
These do exist in later editions and indeed even in Pathfinder, but the list of 3.5 potions that we have available isn't exhaustive or directly ported from the sourcebooks on Arelith either.
Thank you for taking the time to read.