First from the other posting: You can take DE and raw garlic always. As Colon Cleanse I recommend P&B shakes, that is psyllium and bentonite.
Tapeworms are difficult to kill. The chemical drug is niclosamide, you can get it on Ebay from Thailand for example.
I don't understand the question about CoQ10 and doxycycline. CoQ10 is a coenzyme, but when people talk about enzymes against parasites they mean other enzymes. There are products specially for parasites. You can also buy any digestive enzymes high in protease.
Dr. Hulda Clark has a treatment called mop-up program and it consists of CoQ10 in very high dosage and ozonated olive oil with Cysteine. You can try that or just take the ozonated olive oil.