More Arimidex over time on longer cycle?

[DrSauce99]

I’m seeming to notice I need slightly more arimidex over time ( per week ) while on cycle to keep my estrogen in check. Anyone else notice this?

I seem to have a very narrow window of estrogen not being too high or too low so a little difficult to balance

[powerliftmike]

Are you getting bloodwork done to check if you are estrogen conversion sensitive? If you are trying to add mass ditch the AI altogether. If you are cutting I would prefer DHT based AAS and again skipping AIs. If you must, aromasin is a better option. It certainly is conceivable you could build tolerance to arimidex but I have not heard of this. Did you change sources? How much are you using?