Doxazosin Mesilate drug substance is packed in double low density polythene bags inner transparent (Primary packaging) and outer black (secondary packaging). The transparent polyethylene bags used as the primary packaging component which is in contact with product which are in compliance with the USA CFR (21 CFR 177.1520&21 CFR 179.45). The inner LDPE transparent bags and outer black LDPE bags both are food grade. The food grade certificate obtained is attached for your information. The reason for black bag selection as secondary packaging is due to its light barrier nature( protection from light).