What does the erliworm say it treats in terms of worms it kills? When did you start him on the medication?
Yes, this is treatment for round worms only. I suggest using a wormer that treats multiple types of worms, since you haven't had the parasites identified by a vet.
Homeopet wrm clear treats round, hook and tape worms.
Of course the prescription medications from a vet do work better and faster.
Keep the litter box clean every day. Flush the stools down your toilet. Wash your hands really good after cleaning the box. Direct handling of the stool is where cross contamination occurs.
If your still seeing worms after 10-14 days of treatment, you will need to obtain a prescription wormer from your vet.
If your seeing live active worms in the fur or around the anus, I wouldn't let him sleep with me as a precaution.
Active ingredients in multi wormers are:
Gran., Kamala, Chen. Anth., Filix M. Cuc. Pepo, Cina, Spig. A., Teuc. M., Thymol, Nux. V., Arsen Alb
Just look for wormers that state treat round, hook, and tape worm. Ingredients may vary from brand name to brands name. PLus I don't know what you have available to you where you are. If you have feed and seed stores, that is the place to look.
If you have any way to obtain the prescription Drontal, that is the best medication to try. But again this is a prescription here in the states.