Skyla's Brewing Disabler:

• Disables potion brewing
  • (actually disables refueling brewing stands to remain compatible with the brewery plugin)
• Disables Potion drinking
• Disables lingering and splash potions
  • also disables their use in dispensers

Fully customizable with the config.yml file and commands:
List of current commands
An in-depth explanation of the config file

If you have any questions/suggestions to improve the plugin, feel free to leave a comment! Ratings are always appreciated!