Separately Administered Phosphodiesterase-5 Inhibitors (Sildenafil and Tadalafil) and Opioid (Tramadol), Reversibly Alter Serum Lipid Profile in Male Albino Wistar Rats

Victor Udo Nna, Ubom Paul Akpan and Eme Efiom Osim

Asian Journal of Biochemistry 10 ( 4 ): 132 - 144 , 2015