A SAMPLE history is a quick patient assessment tool used by emergency medical providers, first responders, and EMTs to gather critical health information in a structured way. The acronym SAMPLE stands for Signs and Symptoms, Allergies, Medications, Past medical history, Last oral intake, and Events leading up to the current situation. It’s one of the most widely taught frameworks in emergency medicine and is a scored component of the National Registry of Emergency Medical Technicians (NREMT) patient assessment skill sheets.
What Each Letter Stands For
The power of the SAMPLE mnemonic is that it organizes six categories of information into a sequence that’s easy to remember under pressure. Here’s what each letter covers and why it matters.
S: Signs and Symptoms
This is the starting point: what’s actually wrong? Signs are things a responder can observe or measure, like pale skin, swelling, or an abnormal pulse. Symptoms are what the patient describes feeling, like pain, dizziness, or nausea. The goal is to define the reason for the encounter as specifically as possible. A responder will typically ask about the onset of the problem, its location, character (sharp, dull, constant, intermittent), how long it’s lasted, what makes it worse, and what makes it better. Any associated symptoms matter too. Someone with chest pain who also reports shortness of breath and arm numbness paints a very different picture than someone with chest pain alone.
A: Allergies
This covers allergies to medications, foods, environmental triggers, and materials like latex. Knowing about allergies before any treatment begins prevents dangerous reactions. A responder needs to know not just what someone is allergic to, but what type of reaction they’ve had in the past, whether it required emergency treatment like epinephrine, and how severe it was. If the patient is unconscious, a medical alert bracelet or information from bystanders can fill this gap.
M: Medications
Current medications reveal a lot about a person’s health even when they can’t communicate well. Someone carrying an inhaler has a respiratory condition. Someone on blood thinners is at higher risk for internal bleeding after a fall. This category includes prescription drugs, over-the-counter medications, supplements, and herbal remedies. The specifics matter: what they take, how much, and how often.
P: Past Medical History
This focuses on pertinent medical history, not a complete life story. A responder is looking for conditions that could explain the current problem or complicate treatment: heart disease, diabetes, seizure disorders, recent surgeries, or chronic conditions. “Pertinent” is the key word. If someone collapses at a gym, knowing they had knee surgery five years ago is less relevant than knowing they have a heart condition.
L: Last Oral Intake
This means the last time the patient ate or drank anything. It sounds minor, but it’s vital for two reasons. If the patient needs emergency surgery, a full stomach increases the risk of vomiting and inhaling food into the lungs while under anesthesia. It also helps assess certain conditions. A diabetic who hasn’t eaten in 12 hours and is confused is likely dealing with low blood sugar.
E: Events Leading Up
The final letter captures the timeline of what happened before the emergency. This builds a chronology: when the problem started, whether it came on suddenly or gradually, what the person was doing at the time, whether anything changed or worsened, and what prompted them to seek help now. It also includes what the patient has already tried for relief, whether that’s rest, medication, or ice. This context helps providers distinguish between, say, a heart attack and a panic attack, or a new injury versus a flare-up of something chronic.
How SAMPLE Is Used in Practice
In real emergency settings, a SAMPLE history rarely unfolds in perfect alphabetical order. A paramedic arriving at a scene might start with “What happened?” (Events) and “Where does it hurt?” (Signs and Symptoms) before circling back to medications and allergies. The mnemonic is a checklist, not a script. Its value is making sure nothing critical gets missed in a high-stress moment.
The NREMT evaluates EMT candidates on their ability to collect each SAMPLE component during patient assessments. Each element, including allergies, past history, events, medications, and last oral intake, is individually scored. This reflects how fundamental the tool is considered in prehospital care.
SAMPLE With Children and Unresponsive Patients
The framework works differently when the patient can’t answer questions directly. With young children, the history almost always comes from a parent or guardian, who may not be able to perfectly convey what the child is experiencing. Responders are trained to build rapport with both the child and the caregiver, starting with casual conversation before diving into clinical questions. The caregiver’s relationship to the child is noted because a parent typically has more detailed medical knowledge than a babysitter or teacher.
For unconscious or confused patients, responders piece together a SAMPLE history from other sources: medical alert jewelry, medication bottles in a pocket or nearby, bystanders who witnessed the event, or electronic medical records if available. Even partial information is useful. Knowing just one element, like that someone is on insulin, can redirect the entire course of treatment.
SAMPLE vs. Other Assessment Tools
SAMPLE isn’t the only history-taking mnemonic in emergency medicine. OPQRST (Onset, Provocation, Quality, Region, Severity, Time) is commonly used alongside it to dig deeper into pain or symptom characteristics. While OPQRST zooms in on the current complaint, SAMPLE casts a wider net across the patient’s overall health picture. Many providers use both together: OPQRST to understand the symptom and SAMPLE to understand the patient.
In hospital settings, physicians conduct far more detailed histories that include family history, social habits, and system-by-system reviews. SAMPLE was designed specifically for the prehospital environment where time is limited, conditions are unpredictable, and the goal is gathering the most important information as quickly as possible. The information collected through SAMPLE gets passed along to the emergency department team, giving them a head start on diagnosis and treatment before the patient even arrives.