In a pharmacy, Mr R. asks for sildenafil. Pharmacists may dispense it after a check. Erectile dysfunction can be an early warning sign of heart disease. Mr R.'s blood pressure is elevated, and it was before as well. He has not seen a doctor. The pharmacist sells him the sildenafil, but notes down the physician's number and announces that he will call. The medicine relieves the symptom without addressing the cause. The pharmacist wants to preserve the early-warning value of that symptom.