"Pfizer has been forced to issue a lockout notice at its Thane manufacturing plant to ensure the safety of our colleagues," the company said in a statement.
There have been multiple incidents of indiscipline, threats to our management personnel as well as attempts to disrupt production lines by certain workers, it added.
The Thane manufacturing plant employs 212 workers. This notice for lockout will not impact the supply of any of our products or medicines to patients, Pfizer said.
In a filing to the BSE, Pfizer said because of the incidents "it has become impossible for the management to continue with the operations of the plant in a peaceful and productive manner".
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"We are not in a position to resume operations until we are assured by the workmen that the safety of our colleagues will not be compromised in any manner and that the workmen will not indulge in acts of indiscipline at the plant," the company said.
Shares of Pfizer Ltd today closed at Rs 1,340 per scrip on BSE, down 1.33 per cent from its previous close.