The normal annual prophylactic dose for general anti-parasitic use is 150ug/kg as a single dose. So one 15mg dose for a 100kg adult. That's sufficient to kill almost all internal parasites that affect humans.
On another note. in areas where this is routine, it's been noted the rate of many other non-parasite related diseases goes down, and average lifespan increases by several years.
For clearing demodex skin parasites, it's 200ug/kg, once a week for 8 weeks. While I didn't have rosacea like this guy, I had a noticeable evening of skin tone all over.
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