If I understand well, humans have to swallow those awfull pills ?
Until now I was trying to force mosquitoes (female only) to swallow them...not easy and very tedious, believe me !
Should have better read the notice before.
Personnally I have given up a preventive treatment, and I rather stick to a curative one with "Alfan" but it said that "obscure" side effects might be expected ???? I'm still waiting !