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
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.
LSD was used in medical trials and is experience a resurgence in research. It was never prescribed to people (i.e you could never go to a pharmacy and pick up LSD).
The most common problem with LSD is the "bad trip" experience where they experience extreme fear, paranoia, depression or panic. If LSD is used regularly it often causes mental illnesses. Some people complain that they suffer flashbacks long after a trip.