Because of your pets health. If you have a 26lb dog receiving a pill for 26-50lb dogs, not only are you giving them double the necessary dose of neurotoxins and pesticides, but you are giving them an *entire months* worth up front. An entire months dose for a 50lb dog. These things *could* be given on a weekly basis at a dose intended for a 26lb dog.
Making the world better, one answer at a time. I am a sixty one year old woman who is in good health. I received a tetanus shot yesterday and hours later I was feeling a bit tired. Romany Sedhom.
If it is recently, then you should be able to wait 24 hours, but just to play it safe, I'd ask your doctor. Good luck and have a great trip. If you have had a tetanus shot within the last 10 years, you should be safe. But I'd get the booster shot as soon as you can, to not take any chances. Source(s): alohahowzit Â· 8 years ago.