Sunrise Remedies Pvt. Ltd. stands out as the primary producer of Zhewitra 20 mg, manufacturing various vardenafil formulations (including higher-dose and combination versions). Centurion Laboratories is acknowledged as a significant manufacturer of the generic Zhewitra 20 mg as well. Distributors like The Lotus Biotech, Spark Lifesciences, and Oddway International further support the global availability of this medication by exporting it worldwide. If you're seeking reliable sources, always ensure products are sourced from legitimate manufacturers like Sunrise Remedies or Centurion Laboratories and purchased through reputable pharmacies or certified distributors.