Hello and welcome to HCM
If you take some precautions than you may not need any medication for a long time:
1. Avoid jerky movements of the neck.
2. NO pillow for sleeping
3. Use hard bed.
4. Don't keep the neck in single posture for a long time.
5. Do regular cervical exercise as advised by your physiotherapist.
Now about the side effects of the medication: long term continuous use of this medication can show it effects like hepatic and renal dysfunction
, stomach discomfort
etc. But occasional use are allow for a long term also. If you feel any of the side effect in you than immediately discontinue the medicine.