Essex's reply faltered right at the start as Razzaq dismissed openers Mark Pettini and Matt Walker, and Grant Flower soon followed with only 11 runs on the board.
The Stade Francais number eight is added to Saturday's 22, along with Rob Dewey, Max Evans, Mark Robertson, Nikki Walker, Simon Webster, Kelly Brown, Geoff Cross, Alastair Kellock and Alasdair Strokosch.
Britain's former Olympic 100m champion Linford Christie, 400m runner Mark Richardson and Scottish sprinter Dougie Walker have all tested positive for the substance.