Pyrilutamide (KX-826) has very similar properties as RU58841, but it is a way more refined and stronger version. Pyrilutamide is a very well tolerable, with very few systemic side effects. From anecdotal and indoor research, there were no significant side effects to note with dosages up to 5 mg per day, whilst hair loss was significantly reduced within the first weeks. This makes a huge promise for the treatment of androgenic alopecia, and specifically diffuse androgenic alopecia, which is a very hard to treat form of androgenic alopecia. Both RU58841 and pyrilutamide are very effective to reduce hair loss from androgenic alopecia. As with everything, there is no one-size-fits all solution for androgenic alopecia, but pyrilutamide comes very close to this.