If you live in the US, generic propecia is cheap at Costco, 22.00 for a three month supply. If something is working for you, don't change it. Though splitting proscar probably won't have a negative effect, it could. I've read plenty of accounts of people switching from 1 mg to 1.25 mg and end up regretting it. My own experience with the 'flat dose response', i. e., .25 mg being the same as 5 mg, along with the experiences of many others, is complete bullshit. Don't believe it. That extra .25 mg MIGHT have a negative impact. Do you know that it will or not? No, because there is no way pf predicting that and you don't want to find that out the hard way, especially if you are satisfied with the results you are getting now. If you switch and end up losing a bunch of hair, the money that you saved will be the least of your concerns.