Pros
Pain reliver known as safe to use opium.
Sediative
Muscle relaxer
Anesthesia
anxiety
respiratory conditions
menstrual cramps
arthritis
cancer
insomnia
poor circulation
restlessness
urinary infections
antibacterial
 
Cons 
dizziness
extreme sensitivity to light
sweating
hallucinations
anxiety
urinary retention
blurred vision
headache
nausea
vomiting