5 mg morphine is equivalent to 5 mg hydrocodone is equivalent to 30 mg codeine (orally). If you have NO tolerance, you might feel a little something, but you definitely won't be fucked up. One option is to "plug" it or take it rectally. You can use a needless medicine syrup syringe to use. It will hit you better that way (higher bioavailability), and even still I highly doubt you'll be fucked up. Are you sure the morphine pill is 5 mg? I didn't know those were even made.