What are you trying to accomplish, and how do you feel?
Also, was that a typo in your post? Did you mean 25 mg/day? Because you said 25/week. DHEA is generally taken daily due to half/life(though there is a large discrepancy between DHEA and DHEA-S). And even if you are taking 25mg/day, I don’t think doubling that would be the best approach. If you do want to raise levels further, maybe go to 37 mg/day(so 1.5 of your current pills). But again, would need more insight into your reasoning for wanting to get your levels up to the top of the range.