It sounded very strange to us too, Chatty. Over time the drugs do lose their effectiveness.

He is going to ask for a second (and probably third) opinion.

So far I've found nothing on the internet. Articles on the prophylactic use of antibiotics details experiences like yours - of short duration for a specific purpose and time.

My parents have been gone for a long time. I'd forgotten what it was like trying to take care of an elderly person.

Thank you for responding!

WW