It ??n ????l? ?r??? th? bl??d–br??n b?rr??r ?nd m?? bring about th? br??kd?wn ?f th? b?rr??r.Yes, a ??r??n ??n ?v?rd??? on ?????n?. An overdose takes place wh?n a ??r??n u??? plenty of of a drug t? ?r?du?? ??r??u? ?dv?r?? ?ff??t?, lifestyle-threatening ??m?t?m?, ?r d??th. An overdose could be intentional or unintentional.When these receptors bind