Modula 5 mg is prescribed to improve the ability to attain and sustain an erection in men with erectile dysfunction. It works by increasing blood flow to the penis during sexual stimulation.The standard dose of Modula 5 mg is 5 milligrams of tadalafil. Dosage adjustments may be made by a healthcare provider based on individual response and tolerance. It is important not to self-adjust the dosage without consulting a healthcare professional.