your referring to hexarelin right? not knocking the misspelling but I googled thinking you were running a new unknown peptide... lol well its the most potent of ghrps and like ghrp2 or ghrp/ghrh combos you will get a raise in blood pressure... how much all depends on the individual... but I would think even ghrp6/ipa with cjc could still cause a considerable spike for the right person even though they are regarded as being the milder of ghrps...
i remember reading hex has a more cardiac health promoting aspect to it than other ghrps but that still doesnt take away from the possible spike.. best thing would to start at low dose low frequency to see how body takes.. say the 1mcg/kg just post training.. monitor your bp, then either see what 2mcg/kg dose does if your trying to maximize your pulse or keep it at the 1mcg/kg and increase post WO and prebed... monitor and go from there.. I can say first hand tho that when you start dosing in the 2-3mcg/kg range you will desensitize after 4-6wks approx.. then have to take a week/two off to recover and either switch to ipa/ghrp2 or run hex until you desensitize again