The active ingredient of Propecia, finasteride, was originally marketed in another higher dosage under the trade name Proscar. The amount contained in Propecia differs considerably: if it is 1 mg per tablet, the dosage for Proscar is five times higher at 5 mg.
The different dosage is connected to the underlying application: Proscar is used for an enlarged prostate or prostate cancer and has to lower the DHT more substantially with this possible life-endangering condition. Then it does not matter what side effects such as a worsened libido occur – in relation to this it is unimportant.
In the long-term treatment of hair loss, on the other hand, tolerance plays a much more important role. Nobody wants to suffer a loss of libido or other sexual impairments as a male user. It is ultimately a purely cosmetic problem.
The interesting point now is that the price of Proscar is not five times higher. So many users have already had the idea to buy the higher dosed product and to cut the tablet into fifths. At first sight, this will be very useful, but in practice, there are some difficulties to overcome. The tablet is relatively small and an even division is almost impossible. Above all, a division into five equal parts is much more difficult than quartering.
Nevertheless, this has not prevented economical users from looking for solutions to this problem. Approaches for this go into crushing in a mortar and mixing with other aids. Due to the increased volume, better distribution is possible. Nevertheless, it is doubtful whether the accuracy of the dosage of the original tablet will be achieved. Certainly, there are certain tolerances here (especially with regard to overdosing, there are no impairments to be expected in these orders of magnitude), but it is doubtful whether an even therapy with such an auxiliary solution can be achieved here.