Hello and welcome to hcm,
Usually in dental procedures,lignocaine or lidocaine
solution aith or without adrenaline
In severe cases,general anaesthesia
is given under supervision of anaesthesiologist.
Morphine is usually not recommende to numb the nerves.
Usually local anaesthsia is injected in pulp therapies,extraction of teeth etc.
Please do get an opinion of your dentist
regarding such treatment plans.
These procedures are carried under medical supervision.