You can either hide a tablet in food or a treat or give it to your dog directly, if he/she will not take it in food
Take the tablet in your right hand (if you’re right handed,) grasp the dog’s muzzle gently but firmly with your left hand just behind the canine teeth (thumb one side, fingers the other). Tilt the head back, the lower jaw should open slightly.
Place the tablet as far back as possible in the mouth as quickly as possible. Hold the mouth closed for a short time and either tap or blow gently on the nose to encourage swallowing.