"i started using percocet approximately nine months ago &amp; for the first time in many years i was relatively pain free &amp; could function again. i had no side effects, was alert and never groggy. my dosage was gradually increased from 5/325 to 10. (23 years ago i ruptured a disk at c4/c5 causing debilitating occipital headaches and neck pain. i now have chronic cervical &amp; lumbar pain due to degenerative disk disease &amp; other issues.)  the only problem i found with percocet was  that it would work for about 1-2 hours and then the pain would return with four hours before my next dosage. last week i was switched to 10 mg. opana and once it got in my system, i can go for at least 4 hours relatively pain free. still need a long lasting medication."