You should not see any side effects from the Tetracycline as it is often presribed for dogs :) If it makes YOU feel better, you can have him vomit the pill up if you wish. You can do this with a teaspoon or 2 of hyrdrogen peroxide if he swallowed it in the past hour or so. Hope this helps and let me know if I can help you further regarding this. :)
**Although a deposit was put down, I, PERSONALLY, don't get paid until you click the Accept button..your deposit remains with Just Answer**