For me i QUIT after 6 weeks of going horrendously thin at the entire front... that was 2 weeks ago.. the shedding has stopped and i feel great again... that 6 weeks was hell, especially having to look, analyse and apply it twice a day. It caused me a hell of a lot more grief than simply not using it at all. So im putting my faith in those shed hairs growing back anyway... i'll give it three months and take it from there...
For now im sticking with Zinc, Proscar, nizoral and about to start Multivitamins with a new healthy diet... i feel good again already. But its up to you... shedding fu%$&ng sucks.