Unless you have documented proof, beyond a shadow of any doubt, that you have been injured by this mistake, you may not have a case at all. You have cited other cases but have said nothing here that would make one believe you have had a crisis or have had permanent damage to your heart as a DIRECT result of taking these drugs, I don't know that you would get anywhere. You would have to be pretty convincing to a jury and most juries are hard pressed to give out awards these days because most are fed up with all of the lawsuits out there. Good Luck.
This would be something to discuss with a lawyer that specializes in medical problems. S/he could honestly tell you whether you have a case or not. If you have some health problems, it may be difficult to tie them directly to the medication and high BP. Remember how hard it was for other people to tie health problems to cigarettes or working in coal mines.