He said it took almost two years for the company to adequately warn doctors about the potency.
Some shareholders complained last month that they were not adequately warned about the company's difficulties.
The jury ruled that Merck had adequately warned doctors and patients of the drug's risk.
Only two of three intersections are marked, the group says, but they do not adequately warn motorists.
Around 36,000 women filed suit with the company throughout the 1990s, claiming that they were not adequately warned about Norplant's side effects.
And he said his American legal advisers did not adequately warn him of the potential penalties for flouting the regulations.
I suspect there may be a stain on the seat when we get out, but, hey, we were all adequately warned.
Suits based on product liability, for example, often allege failure to adequately warn users of potential side effects.
The Florida suit claims that the industry knowingly addicted smokers and then failed to adequately warn them.
"A failure to prominently and adequately warn consumers could constitute, at the very least, a deceptive trade practice," the letter stated.