Shimla, Dec. 11 -- A comprehensive inspection of 20 pharmaceutical manufacturing units was carried out across Himachal Pradesh on Wednesday, and irregularities were detected in four such units, officials said on Wednesday.

The drive was jointly conducted by Himachal Pradesh Police and the State Drugs Control Administration. Necessary legal action, according to the prescribed provisions, is being initiated against the erring units, a statement issued here said.

The inspection was conducted across six districts, which includes two units each in Una and Bilaspur, four units in Solan, one in Sirmaur, one in police district Nurpur and 10 pharmaceutical manufacturing units in police district Baddi. Inspections in five other units were underwa...