"There is temporary impact on production, for which the company is putting in place contingency measures," the company said.
The conciliation process between the workers' union and the management is being heard at the state Labour Commissioner's office, Pfizer told BSE.
"The management hopes to resolve the matter expeditiously," it added.
Pfizer was trading at Rs 2,160 on BSE in the morning trade, up 0.82 per cent from its previous close.