Chandra Bhagat Pharma Pvt. Ltd. Offers Protamine Sulfate Injection. Chandra Bhagat Pharma Pvt. Ltd. Supplies medicines from antibiotics to anti-neoplastics and from cardiovascular to hormones. Protamine Sulfate Injection has been available in the pack of 50mg/5ml. Protamine Sulfate Injection has been used as cardiovascular drugs. This is available in the brand name of Newtain. It is a sterile, non-pyrogenic, isotonic solution of protamine sulfate in Water for Injection. This injection acts as a heparin antagonist. It is also a weak anticoagulant.