C|alis 20mg x 30 pil-ls = $135.95
the antibiotic erythromycin (E-Mycin, Eryc, Ery-Tab, others); an antifungal medication such as itraconazole (Sporanox) or ketoconazole (Nizoral); or HIV medications such as indinavir (Crixivan), ritonavir (Norvir), and others.
an alpha blocker (other than tamsulosin (Flomax) 0.4 mg once a day) such as doxazosin (Cardura), guanadrel (Hylorel), prazosin (Minipress), terazosin (Hytrin), alfuzosin (Uroxatral), and others.
Tadalafil is used to treat erectile dysfunction (impotence). Tadalafil may also be used for purposes other than those listed in this medication guide.
nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"); or