No, filing suit against your physician or pharmacist may be unnecessary. Defective drug claims are typically filed against manufacturing companies. These are the companies that create, market, and distribute the medication, not your doctor or your pharmacist. In some cases, doctors are surprised when they find out the side effects of some medications. When a doctor or pharmacist's error when prescribing or packaging a drug is the root of the patient's injury, this would cause a different type of case.