Penegra 50 mg is listed as a sildenafil product from Zydus Healthcare. You can verify the product and check your pack using these official resources. Zydus Healthcare Limited. +1 Manufacturer: Visit Zydus Healthcare and ask customer support to verify your batch number. Drug safety: Use the CDSCO consumer portal to check official information about substandard medicines. Purchase source: Use a licensed pharmacy and retain your invoice. To help check your specific pack, upload clear photos of the front and back of the box and the tablet strip. Include the batch number, manufacturing date, expiry date, and manufacturer details. You can cover personal information. I can help spot inconsistencies, but only the manufacturer or an appropriate laboratory can conclusively establish authenticity.