There's no need to panic because NYDA's double action formula is effective against all stages of head lice after only one treatment.
NYDA and NYDA Plus uses a 92% Dimethicone dual formula to take double action against all stages of head lice. It is a unique treatment supported by in vitro (lab) and clinical tests to eradicate adult head louse, nymphs and eggs. Head lice treated with NYDA® in an in-vitro study were knocked out in just a few minutes.
Simply sit, spray on, wait 10 minutes, comb to remove lice and eggs, wash hair with normal shampoo and say goodbye to your head lice problems!
*Family dose is estimated as one application for 3-4 people. This may vary depending on length and thickness of hair