Icariin is pretty safe, even at high dosages. However, you should not be taking high dosages for longer than 3 consecutive months. However, if running light to moderate doses you can continuously run it...I never take a break from rpm really...I just cut my dosages after a while. Same thing with DRIVE. I'll take high dosages for 8-12 weeks and then cut back for a bit. Its just a standard smart practice to follow.
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Taking DRIVE and Stoked together is perfectly fine. No problems there at all.