Drug regulators believe the same gang is behind a spate of counterfeiting, after issuing its fifth recall in two weeks.
Following a recall on bicalutamide (Casodex) last week, the Medicine and Healthcare products Regulatory Agency (MHRA) has launched an alert on more counterfeit batches of clopidogrel (Plavix).
The recalls began on 24 May when a counterfeit batch of the schizophrenia drug olanzapine (Zyprexa) was discovered. An MHRA spokesperson said investigation of these fakes resulted in discovery of a first batch of contaminated clopidogrel several days later.
The second affected clopidogrel batch numbers are 3103/1 to 3103/20, with the expiry date of July 2009.
A separate investigation into counterfeit bicalutamide is also ongoing. The spokesperson said: 'We are looking into the possible links between the investigations.'