1 mg per day is equivalent to oral morphine
75 mg per day. Most patients require between 1 mg and
4 mg per 24 hours intrathecally to achieve reasonable comfort. This is equivalent to between 75 - 300 mg oral morphine
per day. Even with this "Rolls Royce" technique, 100% pain relief is not attainable nor expected. Co-medication with paracetamol, NSAIDs, amitriptyline and
gabapentin may still be necessary.