Wormer for dogs & cats

[Always-Riding]

What wormer do you recommend for cats & dogs?

Fed up of buying wormers off the vets at rediculous prices when online it's a lot cheaper. But I'm unsure which to buy

 

[s4sugar]

Cestem or ProWormer -the same composition as Drontal but much cheaper.

 

[Chestnutmare]

Advocet for dog n usually drontal for cats

 

[Cyrus]

Four seasons natural wormer for dogs and cats loco has been on it for 3 years and not a single worm problem

 

[s4sugar]

Four seasons natural wormer for dogs and cats loco has been on it for 3 years and not a single worm problem

How do you know?
I would not consider this a wormer; Tincture prepared using Organic Cider Vinegar
Herbal content - Hibiscus, Thyme, Ginger Root, Cloves, natural salts, organic Bitter Apple
Homeopathic content - Filix-mas 12x, Cina 12x, Ferrum-met 12x, Sulphur 30, Abrotanium 12x, Teucrium-mar 12x