[deonk1]

If you do wait for morning, monitor him ALOT. We had an issue with Harley a while back, and when he started to get sick, it was quick.

Watch for no drinking (fill that water bowl to a line so you know exactly what he's drinking) and watch for lack of appetite. If he is drinking and eating that is a great sign...
Harley ingested something that upset him, and he didn't eat or drink over night. Later that morning he got pretty sick.

I'm not trying to scare you, but here's what to do if things don't go well in the next few hours.
If you see diarrhoea with blood, make sure you baggie it (well actually any diarrhoea whether it has blood or not), don't clean it up and throw it away, the vet will need that. Also bring the box of the med you think he ingested with you to the vet. They have a poison control line that'll tell them what to do. One diarrhoea isn't the end of the world, so don't panic, just be ready to up and leave... Wrap him in a white blanket on the way to the vet, that way you know if he goes again. A second pool of diarrhoea, means drive faster, he may need a shot to assure he doesn't get too low on sugar/water. Same with throwing up. If he does one or the other more than once each, he's going to be dehydrated.

Good luck through the night. Remember to keep calm. I'm sure your baby will be fine, and please keep us posted. I'm not trying to scare you with the information I just gave. I want to prepare you for what to do in case he gets sick before you can see a vet.

These little guys are surprisingly tough, and if it makes you feel better, my Harley survived ingesting what we think to be a poisoned coachroach (long story) anyway he got dehydrated and had to go on a bland diet, but he was fine on some stomach settling meds.