Tell me about it! Pain will eat up every bit of that.
Before I got my hips replaced I was working on 20 mg of opioids every four hours with my doctor's blessing. I was straight as an arrow the whole time.
I never felt the first "buzz" until after I was down to taking 5 mg a day, post op.
Morphine tabs/caps whether IR or ER “do not” come in 5 mg. 15 mg is the smallest dose. 5 mg like percocet/oxycodone. I highly doubt anything other then feeling tired/pain relief on morphine until after 7-10 days. Kind of like gabapentin regarding being tired at first.