I was taking Extra Strength Tylenol for muscle pain - per my MD. It is fine for the 18 hours that 2 pills each six hours and no more in 24 hours but I needed coverage for the other six hours of pain - which would wake me up. I tried Tylenol 8 HR which is a sustained release form of Tylenol. I figured that this would cover me for the 24 hours. It did not cover me for two hours. I was in so much pain that after trying this for a day and a half, after the first 8 hour dose on that last day ended, I went back to the Extra Strength Tylenol and had immediate and lasting relief. Still in pain for that last 6 hour period in 24 hours, but at least I feel better for the 18 hours I can take it. Also this Muscle 8 Hr seems to be exactly the same as the Tylenol 8 Hr Arthritis version - third party descriptions say it has the same two layer action. Regardless it does not help - at all!
No, I would not recommend this product