Drontal is for the
treatment of tapeworm, not the prevention. Tapeworms are a "side effect" of fleas, so if you have a good flea prevention program in place you generally don't need to worry about tapeworm.
There is no product that prevents every kind of parasite and I would be very wary if there were. Rather than pump my dogs full of poison routinely, I just have them on Advantage on an as needed basis, and do fecal checks for worms several times per year. If they don't have worms they don't need wormer
Of course puppies need to be wormed so I would take a sample when you take him for his first vet check