Fee for Service is a method of reimbursement in which doctors and other health care providers  are paid a set amount for each service performed.  

Fentanyl is a synthetic opioid pain reliever, 50-100 times more potent than morphine. Legally, it  is prescribed in the form of transdermal or lozenges under the name of Actiq, Duragesic, or  Sublimaze. When illegally produced, it may take the form of powder, eye droppers, pill form or  nasal sprays. Other drugs such as cocaine and

Fentanyl testing strips test drugs for presence of or absence of fentanyl, which can help prevent  overdoses or fatalities.   See: Fentanyl