“Contractile responses to dopamine (10−7–10−3 M) in the presence of propranolol, cocaine, and 17β oestradiol were competitively antagonised …) but unaffected by the α1 selective adrenoceptor antagonist doxazosin (10−8–10−6 M), whereas the response to norepinephrine (NE) 10−8–10−3 M) … doxazosin (10−… preparation.”