Potions and elixirs of varying effect can be created through Alchemy. This requires the Alchemy skill (IQ-Very Hard), and can even be used by non-mages (although Magery or Power Investiture adds to Alchemy rolls). Although alchemy does not require magic to study and perform, elixirs generally require magical ingredients.
A particular alchemical elixir can be learned as a Hard Technique. An alchemist who has not mastered an elixir must consult a formulary to get the recipe right. Alchemy always requires basic materials and equipment, but a fully-stocked laboratory can add up to a +5 bonus to crafting an elixir. An alchemist must attend to an elixir at least 8 hours per day while it is brewing. Once the brewing is complete, and Alchemy skill roll completes the process.
For all brewing times, substitute days for weeks. The typical retail cost of an elixir is $100 per day required to create it, plus the cost of the ingredients. Once brewed, elirs lose their potency in a number of days equal to the creator’s Alchemy (plus Magery or Power Investiture). In modern days, most potions come in the form of hyposprays, although drinkable potions are still seen.
Rarer alchemical concoctions, like alkahest, homunculi, or the philosopher’s stone, require extremely hard-to-find ingredients. They use the listed time requirements, and retail for 10 times their listed price.