About 2 weeks, she still has a little bit but i just give her a dose maybe once every 2 days to keep it under control. She doesnt like it either but its important to get it to coat the inside of her mouth so even put a bit on ur finger and rub it all over it. I give Mia half a dose then put her dummy in her mouth and then the other half and then the dummy, this ensures it coats all her tongue and the top of her mouth and stops her spitting it out. If Olive is having trouble feeding coz her mouth is sore the doctor told me to give Mia a dose of panadol 30 minutes before her feed. I have only done this once but it seemed to work coz she wasnt finishing her bottle. Make sure u clean all the teats and things very thouroughly(sp) because thursh can thrive in teats that arnt cleaned properly, even sterilize them. Im not saying u dont clean them properly, just trying to give some advice, i hope that helps hun, thrush is horrible for them.