Smoking is a popular habit among the epicurean nobles and keeping a pipe is commonplace in much of cosmopolitan society. Pipes can be used for a more utilitarian purpose, however, and many herbs (for example) are only effective when smoked. Here is the process and command-set for smoking herbs and poisons:
FILL PIPE WITH <herb or poison> e..g. FILL PIPE WITH MEGILLOS
Use this command to fill your pipe with the selected prepared herb or poison. Typically you will find each individual herb/poison will provide ten 'smoke' opportunities before the pipe must be refilled.
After being filled your pipe will be unlit and cold. You should light your pipe whenever you feel use is impending - it can be lit from any nearby fire, brazier, tinderboe, etc. Many prefer to keep their pipes lit constantly so as to be ever prepared for unexpected danger.
Smoking the pipe will ensure you are affected by the herb/poison it holds. The pipe must be kept lit else you will not be able to suck down the precious, herb-infused pipesmoke.
If you have sufficient Itemlore development you can review your pipes and their contents by typing PIPELIST. This allows you to discover the pipe's unique numbers and is invaluable when handling multiple pipes and multiple herbs, ensuring correct effects are gained when struck by whatever affliction you need to cure.