17 year old niece is dead

I believe Bactrim killed my niece's only child. A beautiful blue-eyed joyful young lady. We buried her a week ago today. After being prescribed Bactrim for bladder infection her mother found her last Saturday morning in her bed dead. She had been told by a physician to take tylenol for headaches and benedryl and now she is gone. My 17 year old great niece just had her 17th birthday the Saturday before. She was so happy, laughing and planning a bigger birthday party for her 18th birthday. Our lives will never be the same. She was my niece's only child. God will give us strength and I have to believe he took her in his loving arms because of what she might have had to endured from this horrible horrible drug. God Bless everyone listening and please beware of the medications you take. I am sending this to you to warn of the negligence of these pharmaceutical companies that are in competition for the money. I realize we are not all allergic to the same medications, but if you take any medication and feel worst before you took it please, please stop taking it and call your doctor. It's too late for my niece, but hopefuly this will help someone else not to have to live through the torment we have been through in losing her. God is my strength and my redeemer. Oh, Dear God how it hurts. Jan