Water can kill you
Anything taken in excess all at once can upset body function causing adverse effects that under certain circumstances could lead to death.
Drinking a half gallon of water all at once can dilute body salts leading to seizures. Claritin
) in the usual doses or even at a double dose is extremely safe. There are reports of death from claritin (loratadine). 2/3 occur in patients over 60.