The B.C. Coroners Service has confirmed that a 16-year-old Langley boy who died last month had ecstasy, as well as an over-the-counter antihistamine, in his system.

There was no trace of paramethoxy methamphetamine (PMMA), the adulterant added to ecstasy believed to have killed at least 13 people in B.C. and Alberta recently.

The teen, along with several friends, took the ecstasy on the night of Jan. 14, according to the coroner. Early the next day, the others heard him collapse and called 911.

He was taken to Langley Memorial Hospital and died there.

The pharmaceutical found in his system, diphenhydramine, is commonly marketed under the name Benadryl.

Barbara McLintock, a spokeswoman for the coroners service, said the agency is still quantifying the amount of each drug in the teen's system.

Until those results are available, "how related [the death] was to the ecstasy, we don't quite know yet," she said.