While out and about or ward them from your home?
The easiest answer is don't go outside at night if you feel there are some in your area. Werewolves don't typically hunt particular people, but easy prey.
To protect your home/ animals grow wolfsbane. For more immediate protection, spread salt in a circle around your house.
First thing you should absolutely do if you're going to be out at night is bathe, wash away your musk.
If you're Catholic or otherwise Christian wearing a medal or icon of St. Christopher is advisable. Allegedly werewolves particularly fear his anger. Another option is St. Francis of Assisi.
Silver shouldn't be trusted to kill on touch. I've heard some say it works, others that it's complete bunk. But good ol' shotguns at least stun. Fill some shotgun shells with rocksalt. I'm not certain it'd work but from a human perspective that's probably the single most painful experience of my life and in most stories werewolves have some sort of aversion to salt.
Also, just pepper spray. Hurts like Hell in humans, imagine what it'd feel like to a dog's sense of smell. If you can get the shit that's meant to deter bears, all the better.