Not every bad reaction to a medicine is a mistake. Some side effects happen even when a drug is chosen, dosed, and given exactly as it should be. The questions that matter are about the specifics: which drug, what dose, who ordered it, who filled or gave it, and what was known about you at the time.
The short answer
Medication problems usually leave a paper trail. An order is written, a pharmacy fills it, a nurse or the patient takes it, and results or symptoms follow. Safety organizations describe errors at each of those stages — prescribing, transcribing, dispensing, and administering — and a harmful reaction can also follow a drug that was given correctly. Sorting out which of those happened is the work of medical and legal review. Your part is to gather the documents and put the events in order.
Build the timeline first
Write down when the medication was started, changed, or stopped; who made each decision; and when symptoms began or changed. Include calls to the pharmacy or the doctor’s office, emergency visits, and anything you were told about what went wrong. Exact times matter more here than in many other situations, because doses are given on a schedule.
The order, the label, and the dose given
Keep the bottle, the pharmacy label, the printed information sheet, and any remaining pills or packaging. Compare what was prescribed with what was dispensed and with what was actually taken or given. A mismatch at any step — a different drug, a different strength, a different schedule — is a different kind of question, and the documents usually show where it began. In a hospital, the medication administration record shows what was given, when, and by whom.
What was known about you
Many medication questions turn on information the prescriber or pharmacist had, or should have had: allergies, other medicines, kidney or liver problems, pregnancy, weight, or earlier reactions. Note what you reported and where — intake forms, portal messages, conversations. Also note whether any follow-up blood tests or checks were planned for the drug, and whether they happened.
Records and questions to bring
Bring the timeline, the medication itself if you still have it, pharmacy receipts and labels, discharge medication lists, portal messages, and a written list of your unanswered questions. You do not need to request hospital or pharmacy records before speaking with someone; that can be handled after a first conversation.
Timing
Connecticut sets deadlines for malpractice claims. Under C.G.S. § 52-584, a claim generally must be brought within two years of when the injury was discovered or reasonably should have been, and no more than three years from the act or omission itself. A separate statute, § 52-190a, requires a written opinion from a similar health care provider before a case is filed, and allows an automatic 90-day extension to make that inquiry. How those rules apply to your dates is a question for a lawyer, so it is better to ask early.