(Sherwood, OR)  --  A 17-year-old boy is in custody after being accused of supplying a synthetic drug to two teenage girls who overdosed on it.  The Washington County Sheriff's Office says the girls took a drug called 25i, a synthetic hallucinogen that can have severe side effects.  Authorities say the two girls who were with the suspect on the side of the road on South Woodhaven Drive in Sherwood Friday evening suffered seizures, but both are expected to recover.  The 17-year-old is facing charges of reckless endangerment.