Male fern does get the heads. I am not certain the amount to take unilterally but it can be found in paratrex so my educated guess would be 150 mg x6 a day for 6 weeks and then 150 mg x 3..three times a week is what the bottle displays on paratrex.
So that looks like 2 full caps spread out twice a day before breakfast and lunch at 600 mg each. Somewhere like that for 6 weeks and then maintenance at 3 times a week.
So I assume male fern is not that toxic afterall.
Valbeza does get the head of the tapes though...but again how much and how often depends on the load and type of worm.
WE will be taking stuff forever it seems like...dunno but at least we will live longer than n ot doing anything at all the monsters are fatal left untreated.