Smelling Salts: Uses, Risks and Safety

Smelling salts are strong-smelling ammonia preparations that can briefly stimulate breathing and alertness when inhaled. They are sometimes used in sports or first-aid settings, but they are not a treatment for the cause of fainting or confusion.

Overview

Smelling salts are small ammonia-based preparations that release a sharp odor when opened or brought near the nose. The intense smell can trigger a brief reflex that increases breathing and alertness, which is why some athletes, trainers, and bystanders use them when someone feels dizzy or sluggish.

They have a long history in sports and first aid, but their role is limited. Smelling salts may make a person appear more awake for a short time, yet they do not correct dehydration, low blood sugar, concussion, heat illness, low blood pressure, or another medical cause of fainting or confusion.

For international patients seeking care, it helps to think of smelling salts as a temporary stimulus rather than a diagnosis or treatment. If a person repeatedly needs them, that pattern deserves proper medical evaluation, especially if the episodes happen during travel, exercise, or after illness.

How They Work

Most smelling salts contain ammonium carbonate or a similar ammonia compound. When released, the vapor irritates the lining of the nose and the upper airway. That irritation stimulates the breathing reflex and can briefly increase alertness, making the person inhale more deeply.

This response is fast, but it is also short-lived. Once the stimulus fades, the person may feel tired, lightheaded, or no different than before if the underlying problem remains. Because the effect is reflexive, it should not be mistaken for recovery.

In some settings, the sharp sensory jolt is what people are seeking. In medical terms, however, any brief wake-up response should be followed by a careful check of the person’s breathing, circulation, awareness, and possible causes of the episode.

Uses and Common Situations

Smelling salts are most often mentioned in sports, where they are used to increase perceived alertness before a lift or after a hard hit. They are also sometimes kept in first-aid kits or training rooms for brief stimulation after a person feels faint.

Even so, their use is controversial. A person who seems faint may actually be having a more serious problem such as concussion, low blood sugar, heat exhaustion, dehydration, a heart rhythm issue, or a seizure. In those situations, waking the person up quickly is not the same as helping them safely.

Because of that, many health professionals prefer simple supportive measures first: stopping activity, sitting or lying the person down, checking for injury, and monitoring symptoms. Smelling salts are not a replacement for those steps.

Risks and Side Effects

Smelling salts can irritate the eyes, nose, throat, and lungs. The strong vapor may cause coughing, sneezing, tearing, a burning sensation, or a headache. If held too close or used repeatedly, they can be unpleasant and potentially harmful.

People with asthma, chronic lung disease, recent respiratory infections, or a history of airway sensitivity may react more strongly. Inhaling a strong irritant can worsen breathing symptoms, so extra caution is important in anyone with a respiratory condition.

There is also a practical risk: because smelling salts can create a sudden wake-up response, they may delay proper assessment of a person who needs urgent medical attention. If someone is not fully alert, has chest pain, trouble breathing, severe weakness, or has hit their head, the safer choice is medical evaluation rather than repeated stimulation.

• Do not place the ammonia source directly against the nose.
• Do not use it on someone who is unconscious or hard to wake.
• Do not use it as a way to “test” whether a head injury is mild or serious.
• Stop immediately if coughing, wheezing, or eye irritation occurs.

Who Should Avoid Them

Smelling salts are not a good choice for everyone. They should be avoided in people with asthma, COPD, or other breathing disorders unless a clinician specifically advises otherwise. Children should not be exposed to them without medical direction.

They are also a poor idea for anyone with confusion, a seizure, suspected concussion, severe dizziness, chest pain, or shortness of breath. In these situations, the priority is assessment and treatment, not stimulation.

Travelers and athletes sometimes keep them on hand because they seem simple and portable, but convenience does not make them appropriate. If symptoms are recurring during exercise, altitude travel, illness, or after dehydration, a doctor can help identify the reason and suggest safer strategies.

What to Do Instead of Relying on Smelling Salts

If a person feels faint, the first step is usually to stop the activity and lie down or sit with the head supported. Elevating the legs can help blood return to the brain in some cases, especially when the cause is simple fainting.

Loosen tight clothing, move the person to a cooler area, and offer water only if they are fully awake and able to swallow safely. If low blood sugar is possible and the person is conscious, a quick source of glucose may be appropriate, but anyone with diabetes or severe symptoms should follow medical guidance.

When symptoms happen after exercise, heat exposure, illness, or long travel, the cause matters more than the momentary reaction. A healthcare professional can advise whether the episode fits dehydration, low blood pressure, anemia, medication effects, arrhythmia, or another issue.

Diagnosis and Medical Evaluation

If smelling salts are being considered because someone is fainting or repeatedly becoming lightheaded, a proper medical assessment is the important next step. A clinician may ask about timing, triggers, medications, hydration, exercise, sleep, and any recent illness or injury.

The examination may include blood pressure measurement, heart and lung checks, blood sugar testing, and sometimes an electrocardiogram or other tests depending on the symptoms. If there was a fall, head impact, or blackout, evaluation may need to be more urgent.

For international patients, it is helpful to bring a list of current medications, relevant medical records, and a brief written timeline of the episode. That information can shorten the path to a clear explanation and reduce the chance of missed causes.

Safe Use, Prevention, and When to Seek Help

If a clinician has said smelling salts are acceptable in a specific situation, they should be used sparingly and from a safe distance, with careful attention to the manufacturer’s instructions. They should never be used on someone who is not fully responsive or as a substitute for medical care.

Prevention usually matters more than rescue. Hydration, adequate nutrition, rest, gradual return to exertion after illness, and avoiding overheating can reduce some episodes of dizziness or faintness. If fainting is linked to standing up quickly, changing posture slowly may help.

Seek medical help promptly if a person has repeated fainting, chest pain, palpitations, severe headache, shortness of breath, confusion, seizure-like activity, a head injury, or symptoms that do not quickly improve after resting. Acibadem Health Point’s multidisciplinary specialists and JCI-accredited hospitals can help diagnose and treat these concerns for international patients when a fuller evaluation is needed.

Frequently asked questions

What are smelling salts used for?

Smelling salts are used to create a brief alerting response by irritating the nose and airway. Some people use them in sports or first aid settings when someone feels faint or sluggish. They do not treat the underlying reason for the symptoms.

Are smelling salts safe?

They can be safe in limited situations, but they are not risk-free. The strong ammonia vapor may irritate the eyes, nose, throat, and lungs, and it can be a poor choice for people with breathing problems. They should be used carefully, if at all, and never as a substitute for medical assessment.

Can smelling salts help someone who has fainted?

They may briefly wake a person, but that does not mean the cause of fainting has been addressed. A person who faints should be checked for injury and for urgent causes such as low blood sugar, dehydration, heat illness, or a heart problem. If the person is difficult to wake or has other warning signs, medical help is needed.

Can smelling salts help with sports performance?

Some athletes use them for a short boost in alertness, but that does not mean they improve true physical performance in a reliable or healthy way. They may also distract from pain or injury, which can be risky. Coaches and athletes should follow sport-specific rules and medical advice.

Who should avoid smelling salts?

People with asthma or other respiratory conditions should be especially cautious, and children should not use them without medical guidance. They should also be avoided if a person has chest pain, shortness of breath, confusion, head injury, or seizures. In those cases, evaluation is more important than stimulation.

When should a doctor be contacted after using smelling salts?

A doctor should be contacted if the person remains dizzy, confused, weak, or unwell after the episode. Medical attention is also important after repeated fainting, any head injury, or symptoms such as chest pain, palpitations, or breathing trouble. Those signs suggest the cause needs proper evaluation.

References

• Mayo Clinic
• Cleveland Clinic
• American Heart Association
• National Health Service (NHS)
• MedlinePlus

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.