(PORT HURON) — A St. Clair County woman convicted of her son’s death from a Benadryl overdose has been ordered to serve up to 50 years in prison. Elizabeth Long received the sentence of 22-50 years on Thursday in a Port Huron courtroom. A jury last month found her guilty of second-degree murder and second-degree child abuse. Sixteen-month-old Lukas died in January 2015. Investigators say he had at least 10 times the normal amount of the medication in his system. Long says she didn’t intend to harm her child but failed to save him. She had testified that she gave him a teaspoon of Benadryl and a chewable Motrin the day he died. Prosecutors say Lukas’ death was avoidable and unnecessary.