 [ Symptoms ] food if i am rushing to eat seems to get “stuck” without a sip of water is it a esophageal disorder [ Disease ] if overdose is suspected contact a poison control center or emergency room immediately us residents can call the us national poison hotline at 1 800 222 1222 canada residents can call a provincial poison control center symptoms of overdose may include slowshallow breathing extreme drowsiness severe stomach pain vomit that looks like coffee grounds