<p>Using blood rage <strong>cancels </strong>the </strong>the +5 skill effect of berserk potion, therefore potion while the -10 shielding effect is not being cancelled. So it's not really efficient to use it if your lvl is higher than 60 (blood rage requirement). I personally use <img alt="" src="https://vignette.wikia.nocookie.net/tibia/images/c/c0/Berserk_Potion.gif/revision/latest?cb=20170904191017&path-prefix=en" style="height:32px; width:32px">only whien I'm lvling my bosschecker/bosskiller knights to lvl 50.</p>50.<br><br>These potions used to be more expensive in 2007/2008, until the blood rage got implemented to the game.</p>