Worm Infestation Problem

[Montana]

Anyone have a problem with their dog becoming resistant to Drontal -Plus? I wormed my dog two weeks ago and this morning her stool was full of worms.... Looked like roundworms and segments of tapeworms. I went to my vet and we're trying Panacur.. hopefully this will work. If not, does anyone have any suggestions?

[dog dr]

were the worms dead? Maybe she just now passed the dead worms. Also, tapeworms will require re-treatment 3 weeks later because the praziquantel only kills a certain stage of the tapeworms.