Ok so I found this on wikipedia but doe it apply?, can you get away with using the medicines in smaller amounts?
Possible health concerns
The UC Berkeley Wellness Letter expressed concern in March 2003 about the unproven long-term safety of Propecia and recommended cutting a standard 1-milligram dose of Propecia into quarters to reduce the cost without reducing its effectiveness. This claim appears to be supported by clinical pharmacological data reviewed by the FDA during Propecia's approval process that suggested that the advantage of taking 1 mg per day over 0.2 mg per day is statistically small.[16] Some people have unsuccessfully petitioned the FDA to re-examine the approved dosage in light of the statistical evidence and unknown long-term risks.[17] The FDA responded and said that just because the level of DHT found in the scalp was not significantly different does not mean there is a correlation with hair loss. A study would have to show that the benefits of using 0.2 mg and 1 mg were not statistically different. According to the FDA, such a study has been performed, and a 1 mg dose has a greater benefit whilst remaining equally safe. The same study also concluded that doses of 0.01 mg per day were found to be ineffective in treating hair loss.[17]
Possible health concerns
The UC Berkeley Wellness Letter expressed concern in March 2003 about the unproven long-term safety of Propecia and recommended cutting a standard 1-milligram dose of Propecia into quarters to reduce the cost without reducing its effectiveness. This claim appears to be supported by clinical pharmacological data reviewed by the FDA during Propecia's approval process that suggested that the advantage of taking 1 mg per day over 0.2 mg per day is statistically small.[16] Some people have unsuccessfully petitioned the FDA to re-examine the approved dosage in light of the statistical evidence and unknown long-term risks.[17] The FDA responded and said that just because the level of DHT found in the scalp was not significantly different does not mean there is a correlation with hair loss. A study would have to show that the benefits of using 0.2 mg and 1 mg were not statistically different. According to the FDA, such a study has been performed, and a 1 mg dose has a greater benefit whilst remaining equally safe. The same study also concluded that doses of 0.01 mg per day were found to be ineffective in treating hair loss.[17]