Hey there! I’m unfamiliar with the prescription you mentioned, but I did have the same problems nursing with both of my kids. For me, the problem was oversupply and a very hard and forceful letdown reflex. My milk would spray out. so, after 5 minutes they were done!
It was like being fed by a firehose for them!!
But, it did NOT help the reflux, and they didn’t always get to the hindmilk either.
I fought this by block nursing – same side for multiple feeds to make sure the breasts were emptied. I also would unlatch my son after the milk let down and let it spray into a cloth. When it stopped, I put him back on, and he seemed much more comfortable. He threw a fit while he was off the breast, but he was ready to eat when I put him back on the breast.
Good luck!