They suck ass. Only a hillbilly will feel them and compare it to heroin. Ive taken 4 80's and didnt feel a fucking thing. They're a waste to me. But if I ever get my hands on a bottle of 120 of em like last time, Im going to go to another state and sell em. They sell by the milligram there.
Here you can get an 80 for 20-25 bucks.

They suck, but if you aren't a user, you may feel it, depends on the milligrams, start w/half, you have to be using them for about 3 weeks to feel a little ill if you suddenly stop.

Just my experience. I write em like a fucking physician.

Edited to add, if he gave them to ya wayyyyyyyyyyyyy back as you say, medication loses potency.