Duratia 90 mg contains dapoxetine, a selective serotonin reuptake inhibitor (SSRI) used mainly for premature ejaculation (PE). It increases serotonin activity in the brain, which delays the ejaculatory reflex and gives men better control over ejaculation when taken 1–3 hours before ***. It does not improve erections or treat erectile dysfunction (ED). Cialis (active ingredient tadalafil) is a PDE5 inhibitor used to treat erectile dysfunction. It relaxes smooth muscle and increases blood flow to the penis during ****** stimulation by preventing breakdown of cGMP, which helps achieve and maintain an erection. Cialis doesn’t directly delay ejaculation. Duratia 90 mg comparison (≈200 words): Purpose: Duratia targets premature ejaculation and improves ejaculatory control; Cialis targets erectile dysfunction and helps produce and sustain erections. Mechanism: Duratia boosts serotonin in the brain to delay ejaculation; Cialis enhances nitric oxide‑mediated blood flow in penile tissue by inhibiting PDE5. Timing & use: Duratia is taken on demand 1–3 hours before *** and used no more than once daily; Cialis can be taken as needed or in a lower daily dose, with effects lasting much longer (up to ~36 hours). Effect on erection: Duratia does not directly enhance erections; Cialis does only in the presence of ****** stimulation. In short, Duratia helps with control over ejaculation, while Cialis helps with achieving and maintaining an erection. Choose based on whether your main concern is premature ejaculation or erectile dysfunction, and consult a doctor for safe, tailored advice.