The generic name of Cialis is tadalafil tablets, so what the title says is actually taking the same drug, and the exact efficacy varies from person to person. Tadalafil tablets are a cyclic guanosine monophosphate specific phosphodiesterase 5 inhibitor, which is effective in the treatment of male erectile dysfunction. The drug has several manufacturers, although the pharmacological effects, indications and so on are basically the same, but the specific effect of the drug varies from person to person. The drug should be contraindicated in people who are allergic to the product, who are taking guanylate cyclase stimulators (such as leucovorin) and nitrates, and who are at potential risk of heart disease. Common adverse reactions during treatment include back pain, upper respiratory tract infection, nasopharyngitis, viral gastroenteritis, influenza, myalgia, hypertension, dyspepsia, and gastroesophageal reflux disease. Specific use of the drug should be under the guidance of a specialist, and should not be used without authorization.