Is there a cheaper option than Droncit/drontal for Dipylidium caninum (tapeworms)?

I had my vet write a RX for Biltricide (praziquantel)600 mg tab by Bayer ( human produce taken for parasites) 10 tabs cost less than $20 at my pharmacy. Dose is 1/4 tab per dog for adult labradors. Did not have in stock, but got for me in a day or two.

Thanks! I'll ask for it.