You can stop it gradually, by intermittent dosing, like take it alternate nights first, then gradually increase the days between doses, like take it once in two days, then three days, then fours days, gradually when he feels better then he can stop.
Next Steps
Along with that he can take other steps to improve his sleep.
1. Maintain wake up and bed time.
2. Avoid high coffee consumption in the day, and avoid coffee altogether in the evening.
3. Do not do any activity in the bedroom or on the bed.
4. Do not take naps in the day time.
5. Avoid mobile or tv screen viewing after 5 pm.
6. Read a book before going to bed.
7. Have dinner earlier than 8 pm, do not eat anything after that.
8. Don’t go to bed until you feel sleepy or tired.
9. When you go to bed, don’t think about anything just try to relax, if you are unable to sleep, get up from the bed, walk a little or read a book until you feel sleepy again.
10. Darken the room completely. This will help you sleep faster.
Health Tips
If at all you feel any difficulty regarding the medication consult a general physician.
If sleep issues persists even after taking the above measures then consult a clinical psychologist.