If you exceed the amount of vitamins you are allowed to take, then YES!
It can drown your cells, making them swell
No, you will get a bad headache. Even if you are trying to get an erection at a stripclub after drinking to much don't do it. THE HEADACHE SUCKS!!
Yes, it is.
Yes, it is.
Water Intoxication
it is not just tastes bad
Water is not bad when having hiccups, because you can do without drinking water. But too much of water may increase its rate.
depends on how much you drink
It can get bad too much caffeine
No. It is bad for you but moderation is the key. I prefer drinking water or semen.
Drinking a lot of water at night time is not specifically bad for you. Your body can hydrate at any time of the day. So long as you are not disrupting your sleep schedule by drinking so much water that you have to wake up to urinate too often you should be fine.
It's good