Wyara, the helpful Hurnscald's witch, also has a Potion Shop and sells there the most common curative or helpful potions.

Items sold in the Potion Shop:

• Cactus Drink (50 GP)
• Cactus Potion (75 GP)
• Iron Potion (500 GP)
• Concentration Potion (500 GP)
• Slow Poison Potion (500 GP)

You can find the script here.