Start off with a low dosage(if you try it). Diflucan can cause a lot of bad side effects and can be hard on the liver and kidneys. I could only do it for a week and stoped doing it because the side effects kept me up at night and was losing a lot of sleep. I had better results from sf722 and essential fatty acids. Most candida experts dont recommend drugs cause of their harsh side effects. People that can take it for 30 weeks in a row sounds like they dont have a strong case of candida otherwise they could not tolerate the side effects for 30 weeks!
I would stop taking it as soon as your body can not tolerate the side effects. Also Ive heard with some people that candida can develop a resistance to diflucan after about a month. Again it all depends on how your body reacts to the drugs some people react better than others. I would rather try a different approach because I could not tolerate the side effects it caused.