 [ Symptoms ] my hair falls out a lot but only when i comb or brush it why is this and what can i do to stop it [ Disease ] if overdose is suspected contact your local poison control center or emergency room immediately us residents can call the us national poison hotline at 1 800 222 1222 canadian residents should call their local poison control center directly symptoms of overdose may include excessive drowsiness coma irregularslowedskipped heart beats heart block