The FDA has approved Amgen and Allergan’s biosimilar of Roche’s Herceptin, just in time for the breast cancer blockbuster’s patent expiry. Herceptin’s main US patent expires this month ...

But the situation is different with cancer drugs. Herceptin, for example, is given at doses of 500 mg or more. “A concentrated antibody formulation like 100 mg/ml would take at least 5 ml to ...