Because LSD is nonfatal, some people consider it safe. Because it produces a powerful effect on the mind, others deem it dangerous. On what basis would you judge a drug safe or dangerous? Which are

Because LSD is nonfatal, some people consider it safe.  Because it produces a powerful effect on the mind, others deem it dangerous.  On what basis would you judge a drug safe or dangerous?  Which are more important - physical or psychological effects?  Explain.