A creatinine clearance test measures how well creatinine is removed from your blood by your kidneys. This test gives better information than a blood creatinine test on how well your kidneys are working. The test is done on both a blood sample and on a sample of urine collected over 24 hours.
Therefore, 5 mg of oxycodone is about 16 mg of hydrocodone so oxycodone is about 3 times stronger than hydrocodone. However, geminigirl is right in that everyone is different. I have read that some say hydrocodone works better for their pain than percocet and viceversa. For me, percocet works a lot better for my pain.
No. Hydrocodone is a bit different opioid than codeine but they are in the same family and therefore similar. Hydrocodone is considered a bit stronger by some, a bit more habit forming, but they work in similar ways.