He thought it was the meds but it turned out it wasnt. He hardly drinks. He went to his doctor because he is also frequently tired, they said he might have sleep apnea. So hopefully they figure it out. Thanks for the help!
Is he taking a new medication? Or drinking more? It might be that. But talk to a dr.
I'm not sure if you need a Dr. I think the problem is that he is stopping during intercourse and is not getting any stimulation so he loses his erection. The same thing happens when switching positions.
You may want to talk to him about starting and stopping several times during intercourse. If he gets used to this hopefully things will get better and he will keep his erection and last longer for you.