@Pawla, you are absolutely right and at the risk of being rude, I don't understand how anyone can expect any dog, let alone a pup, to handle being alone for that many hours on a daily basis. It can work if you have multiple dogs so that there is company, but even then is far from ideal. As I suggested, having someone come and take the dog out a couple of times during the day is one possible solution, but no to leaving a dog alone for that long every day. Maybe an old "couch potato", but even then, it's an unreasonable amount of time without a bathroom break, apart from anything else. And drugging a pup? Really? A vet approves of this?
Time for rethinking priorities and perhaps consider rehoming the dog with someone who has time for him.