The defendants brought two motions to amend their pleadings in an action for "section 8" damages under the Patented Medicines (Notice of Compliance) Regulations.
The proposed amendments sought to introduce a defence based on the ex turpi causa doctrine, arguing that the plaintiff's alleged non-infringing alternative (NIA) would infringe a third-party patent, thus making hypothetical sales unlawful and precluding damages.
The plaintiff opposed, arguing the amendments were not tenable and would cause non-compensable prejudice.
The court, applying Rule 26.01, found the proposed amendments raised tenable legal arguments, distinguishing and interpreting relevant case law on NIAs and the ex turpi causa doctrine.
The court also found that any prejudice to the plaintiff could be compensated by costs or an adjournment.
The motions to amend the pleadings were granted.