He is not against Morphine I take it for Cancer. There are several drugs for nerve pain Lyrica, Gabenpentin,
Trileptal, and few others. For muscle spasms there are muscle relaxers the main ones are Bacolphen, Flexiral, and Zananflex. Many people need a combination. Some drugs work for some people and others for others. My MS Specialist sent me to a pain clinic. It might take awhile to get the right combination and dosage. It took me two years to get on the combination that works.