Dilaudid remains detectible in the saliva or urine for up to four days, according to About.com; however, with the hair follicle test, dilaudid and many other drugs are detectible for up to 90 days. The time it is in the system varies due to factors including metabolism and body weight.
Dilaudid is an opioid pain medication, notes Drugs.com. Doctors generally prescribe this narcotic for patients experiencing moderate to severe pain. It slows the breathing, especially with the first use or an increase in dosage. Dilaudid is a habit-forming drug even when the patient uses it at the prescribed dosage. Breaking or crushing pills has the potential to expose the individual to an overdose of the medication.