Drug offenses in Pennsylvania can vary, but, as the name references, they are criminal offenses that involve drugs. These offenses can include simple possession, knowing and intentional possession, possessing drugs-- in other words, for one's own personal use. They can include possession with intent to deliver, or PWID, which is selling drugs, conspiracy to commit PWID, possession with intent to deliver. There's related offenses that the Commonwealth of Pennsylvania would often charge along with these more, say, fundamental drug offenses-- the use of an electronic device, for example, in the pursuit of selling drugs.
There's various related offenses, in other words, that would go along with the fundamental drug offenses. Being accused of a drug crime in Pennsylvania is incredibly serious. There are steps that an experienced Pennsylvania criminal defense attorney can take to best defend against the allegations. They should be involved from as early as possible in the process.