Davao City Vice Mayor Paolo Duterte has accepted the challenge of Senator Antonio Trillanes IV for him to undergo a comprehensive drug test after the president's eldest son alleged that a senator uses cocaine.

"If the rank and file could submit themselves to drug testing, the more should those elected in public office. Many of them, if not all, may have submitted themselves to a simple drug test before, but I encourage them to undergo the more precise examinations available in Metro Manila that would not just detect illegal drugs in urine or blood but even in hair follicles," Duterte said.

Duterte suggested they undergo the drug test at a high-precision drug test center in Bonifacio Global City, Taguig, which he said could show illegal drugs in hair samples.

He said that the hair follicle drug test can trace seven major classifications of drugs, including cocaine, opiates, metamphetamine, marijuana, ketamine, and benzodiazepine.

Duterte, together with Davao city councilors, previously underwent drug testing conducted by the Philippine Drug Enforcement Agency.
All of them tested negative.

Duterte earlier alleged that he was informed by the cocaine-using senator's friend, who also happens to be his friend, about the vice of the senator.

Duterte, however, refused to divulge the identity of the senator pending the evidence he will be able to gather.

--with reports from Ara Casas, ABS-CBN News