How often do I use this for my dog?

Ok, so I have Evict Liquid Wormer for my dog. Today was the first day that I've given her this medicen. She's 15.8 pounds, a great weight for her size, and she takes 3 teaspoons. Well, after I gave her the medicen, well, a really good question dawned on me. . . How often do I give this to her? I've read all of the box and I've read all of the bottle, NO WHERE does it say how often to administer this. Any ideas?

i wouldn;t deworm my dog unless I had to. I would leave this to the vet. The vet should check a stool sample to see what your pet has for parasites if any.If your dog is a puppy most likely it has worms, but some dewormers either don't work, or don't deworm for what is most common, and us humans like to make mistakes and either under/ overdose. I would have a stool checked at the vet and go with their recommendations

Over the counter workers are often not effective. Take your dog to the vet and have him/her check to see what type of worms your dog has and then prescribe the appropriate de-wormer.

Worming chemicals are very harsh, consequently I have always avoided using wormers. Instead I keep a close watch on their stools, unfortunately seconds after a stool hits the ground worms stop wriggling. Consequently you can miss any evidence of worms.I take the precaution of taking a stool sample to the vets for testing and there has never been any evidence of worms. If there was, I would opt for using the nasty chemicals.Incidentally my dog have always mixed freely with other dogs and I also train them in various dog sports.