Yes, you have to follow a guidline. Albendazole 2 weeks and a week break and then resume. Your hair will fall out regardless of the break but it will grow back.
Tricalbendazole for a few days 2-3 depends on weight.
Prazi can be taken up to 15 days no problems. Actually more effective for 10- 15 days vs 3 days.
There are many ways and it depends on how infested one is , what protocol you are following too. Some are designed for the working norm and others mostly are taken for 3 months wait, 3 months and resume until infection is gone.
Today they are harder to kill and it has been suggested to take herbs between drug protocols for some for they become resistant to drugs, and they can become resistant to herbs.
They are tough to kill these days and it has been recorded since the 70's of high failure rates.
Even for the animals, not just humans.
People with chronic parasite
infections can justify this, it take a long time and persistance.