To complete Master Pharmacist 3, you will need to build and level pharmacies on your map and complete the Master Pharmacist achievement. Master Pharmacist 3 will require you to complete the production of 1500 items in the pharmacy and complete the bronze, silver and gold medals in the master pharmacist achievement in-game. the 300 items that you produce to complete the bronze and silver medals will count towards completing the gold medal. The Pharmacy can be upgraded to level four and can produce Healing Herbs, Berries, Tinctures or Glasses that all qualify as a contribution to the Master Pharmacist 3 total.
Producing Healing Herbs will require baskets to be produced and Ferns to be in the area around the pharmacy. Producing Berries will require bushes to be in the area around the pharmacy. Producing Tinctures will require glass vials, healing herbs and paper to be consumed from the warehouse. Producing Glasses requires trees to be in the area around the Pharmacy. As always aligning a pharmacist resident to work in the pharmacy and levelling that resident will decrease the time it takes to produce items in the pharmacy.