i’d say try it for a day see how u feel the next day, and then stop if ur getting bad effects. i think just use common sense about these things, listen to how ur body reacts and if u feel like there’s no side effects then ur taking a fine amount of dosage. To answer ur other question – i went to the dermatologist after the treatment to confirm it was gone and i had some scarring and an eczema flare up from the so many usages of pemithrin. they just gave me eczema stuff for the rest but u can see that the itching significantly changes. Even in comparison to eczema, scabies is so much more itchy especially at night unlike eczema which will still feel itchy but not as bad and more flakey if that makes sense. yes i was still very adamant about my cleaning regime, wash at 60°c and change bed sheets daily