Do you ave hydrogen peroxide on hand? (The regular 3% household)
When did he eat this?
Here is what I need you to do.............give him one full tablespoon of hydrogen peroxide and then gently shake his stomach to help mix it up. This should cause him to vomit it back up. What I am concerned with is the amount of time that has passed. Digestion starts within the first hour after ingestion so this may not bring up a solid pill.
If the one tablespoon does not cause vomiting go ahead with another tablespoon in ten minutes. If he is able to vomit you will want to keep a close eye on him for the next 24 hours. Based on his size this should not cause any serious reactions but we want to watch out for increased drolling or retching, vomiting (After the vomiting from the peroxide has stopped), dazed or uncoordinated actions or any odd behaviors within the next 24 hours. If he starts demonstrating any of the above he will need to see his vet asap.