LSD can last for a LONG time. Like we're talking 2-4 hours!
Physically, no, LSD is not bad for you. However, you can have a bad trip regardless of if you know how to use it or not and these trips may cause anxiety, depression, and flashbacks.
LSD and Shrooms
a good LSD trip
yes
If you mix the effects of marijuana and LSD, your LSD trip will change in character.
A shroom trip is much shorter, around 4 hours, a LSD trip can last 8-14 hours. The rest of the effects are quite subjective, the are different but it will change from person to person.
Having a very bad "trip."
There are no bad LSD trips. Some are not quite as good as others. It is good gear
never.
LSD is never safe.
All I know is that you get a trip with no kids.
I guess that would be in a hospital or in the presence of a Psychologist. It may not be a good trip, but it's more likely to be a safe trip.