What are those pill drugs that the teens are looking for in the medicine cabinet?

To some any will do. Although some teens are sophistocated and directed in their approach to stealing meds, some will grab anything that looks interesting to use in a "show & tell" moment with their friends.
Stealing pills. There are a great many pills that people can look for to sell or to take for a high. Frequently these are prescription medications for pain, or psychological disorders. Also prescriptions for cough medications or any kind of narcotic. You should check your medication storage areas and keep them safe .