Puppy threw up

Question
 Hello, here are the facts about my puppy....

Beagle - Male, born 06-01-07 (12 weeks old today, 8-24-07)

Had Solo-Jec 7, canine distemper, hepatitis-parainfluenza-parvoirus Vaccine, modified live virus,leptospira bacterin on 7-22-07 and 08-12-07

Wormed withliquid wormer for round worms 07-25-07 and 08-04-07, he had a round worm in stool after first worming.

He recieved his first flea and tick treatment yesterday, treated with Hartz 3 in 1.

All these have been done by us at home, he has not seen a vet yet, he surely will though, we will take him in for his rabies vaccine and to get neutered at 4 months.

Anyway, he is acting fine, running, getting into trouble, eating etc.  BUT, he threw up this morning, a lot, it was like phlegm, didn't have anything solid in it that I could tell.  It was his first outing so I don't think he had eaten or drank anything yet. (I was not the one that took him out so can not be 100% sure if he had eaten yet)
Is this anything to worry about?  Could it be a reaction too he flea and tick treatment he had yesterday?

Answer
Hello...first let me tell you puppies vomit alot...normaly once or twice a week when they are small like your little guy just there stomachs are so prone to upset is why they vomit so often...its nothing to really worry about and since it was just slime it is Very normal, But if it is constant(throws up multiple times in a day or is acting sick in generl) its best he see a vet.