Cenforce contains sildenafil, and sildenafil-containing medicines are prescription medicines under India's Drugs Rules. Schedule H medicines must be sold at retail on the prescription of a registered medical practitioner. In practice, however, some online sellers or local pharmacies may offer Cenforce without asking for a prescription. That doesn't mean the sale is legally compliant or that the product is genuine. I'd recommend getting sildenafil through a licensed pharmacy with a prescription, particularly because you've been asking about higher-dose products such as Cenforce 120–200 mg. The standard maximum recommended sildenafil dose for ED is 100 mg once daily. If you tell me which Cenforce strength you're considering, I can explain the appropriate dose and risks.