Yes, I treat for worms along with a topical flea/tick every month. Do your research on the different treatments. Some meds will enter the dogs system like Ivermec, others like Fenbendazole remain in the digestive track.
A little information about Fenbendazole. It specifically targets the worms and remains in the digestive track. Specifically, it targets round, whip, hook and some tapeworms. I use Ivermec, each month, to target heart and the other tape worms. I also use Vetgard topical treatment, each month, to prevent fleas and ticks.
I would avoid taking pet care advice from a Pet Store. Even people like me....you should be cautious. Do your research and speak with your vet.
My situation and living environment, it is best for me to have my dog on a preventative program using minimal dosage and minimum application.
Worms or parasites can create much worse conditions for the dog than the meds. My monthly regime costs about $1.00/month. I figure its much better than an expensive Vet visit, followed with risky treatment and hospital stay.
This is a bit like changing the oil in your car. Technically, you don't have to change the oil, the engine will run for sometime. Eventually, you will be faced with a substantial repair. Or you can change the oil and prevent the substantial repair. You can choose your course of action.
This region in China is vastly different than the worst areas in USA