Flying common cold pilots: making the right pre-flight call

EASA framework and AMC for flying common cold pilots, with IMSAFE and self-assessment

The common cold and seasonal allergic rhinitis are the most frequent causes of voluntary self-grounding among pilots. The practical question is simple: exactly when is the flight safe, and when must it be postponed? The answer is not just about how you feel, but about specific symptoms that interfere with flight physiology. This article explains the flying common cold pilots decision based on Part-MED, EASA AMC on medication and the IMSAFE framework.

For the full list of permitted in-flight medications, see the dedicated article on permitted medications for pilots. For the post-dose waiting time and for safer medication alternatives for pilots, read the specific pieces, including medication waiting time for pilots.

Diagram with three pathways for flying common cold pilots: fit, fit with caveats, unfit.

Why a cold specifically interferes with flight physiology

Flying common cold pilots is a distinct physiological problem, not just general discomfort. Three mechanisms are at play. First: Eustachian tube congestion prevents pressure equalisation during climb and descent, leading to middle-ear barotrauma (pain, temporary deafness, tympanic perforation in severe cases). Second: paranasal sinus congestion produces intense pain during altitude changes (sinus block). Third: systemic symptoms (fever, myalgia, fatigue) directly degrade cockpit cognitive performance.

For these reasons, EASA and the UK CAA explicitly recommend self-grounding for any acute respiratory infection. The AMC on medication in aviation stresses that, beyond the issue of sedating drugs, the infection itself is reason enough not to fly.

Seasonal allergy, by contrast, is often compatible with flying provided the therapeutic strategy is correct. Here a clear distinction must be drawn between allergy controlled with a non-sedating antihistamine and an acute viral cold.

Acute viral cold: clear unfit criteria

The decision to call unfit for an acute viral cold rests on specific symptoms, not on a subjective feeling. Four operational criteria are accepted as self-grounding triggers.

• Fever above 37.5 °C: absolute contraindication. Fever disturbs cabin thermoregulation and cognitive performance. Wait at least 24 hours fever-free before returning to flight.
• Nasal congestion with inability to clear the nose: barotrauma risk. Simple test — the Valsalva manoeuvre: if you cannot equalise on the ground, you do not fly.
• Productive cough or exertional dyspnoea: marker of lower respiratory involvement. Operational risk plus indicator of potentially more serious illness.
• Feeling of ear blockage or otic pain: absolute contraindication. Risk of eardrum injury during altitude change.

Cold medications: what is allowed and what is banned

The medication risk list for flying common cold pilots is, unfortunately, long. Many combat-cold products (Theraflu, Coldrex, Fervex etc.) contain combinations that necessarily include at least one contraindicated substance.

• Pseudoephedrine, phenylephrine (systemic decongestants): banned in flight. They raise blood pressure and heart rate, and can trigger anxiety. Alternative: saline nasal sprays.
• First-generation antihistamines (diphenhydramine, chlorpheniramine): banned. Powerful sedatives. Alternative: loratadine, fexofenadine, low-dose cetirizine, after ground trial.
• Codeine, high-dose dextromethorphan (cough syrups): banned. Sedation and hypoxia risk. Alternative: hydration, non-sedating acetylcysteine, ambroxol.
• Paracetamol up to 4 g/day: allowed. Ibuprofen 400-600 mg/8h: allowed with hydration. These are the only analgesics without an effect on cognitive performance.

Seasonal allergy: when it is compatible with flying

Well-controlled seasonal allergic rhinitis is compatible with flight duty. The recommended therapeutic strategy includes a topical corticosteroid nasal spray (mometasone, fluticasone) — no systemic effect, allowed in flight — combined with an oral non-sedating antihistamine.

• Loratadine, fexofenadine: classic non-sedating agents, allowed after a 48-hour ground trial. Verify the individual response.
• Cetirizine, levocetirizine: generally non-sedating, but 5-10% of the population experience sedation. Ground trial mandatory.
• Bilastine, desloratadine, rupatadine: newer generation, favourable profile. Accepted with ground trial.
• Corticosteroid nasal spray: first line for moderate-to-severe rhinitis. Allowed, with no ground trial required given the minimal systemic effect.

For allergies with cabin-altitude manifestations (drier mucosa, ocular irritation from cabin air conditioning), the commercial pilot may use preservative-free sterile lubricating eye drops, both in the cockpit and on the ground.

Table for flying common cold pilots: symptom or medication, decision, unfit period.

IMSAFE: the pre-flight self-assessment framework

The IMSAFE acronym is the universal pre-flight self-assessment tool and is explicitly recommended by every aviation authority. The six parameters are: Illness, Medication, Stress, Alcohol, Fatigue, Emotion.

For flying common cold pilots, the first two parameters — Illness and Medication — are critical. Honest answers to three questions drive the decision.

• Do I have symptoms that interfere with performance or with flight physiology (congestion, fever, pain, systemic fatigue)?
• Am I taking a medication with a known risk profile (sedative, systemic decongestant, opioid, first-generation antihistamine)?
• Have I completed a ground trial for any new medication (at least 48 hours)?

If the answer to either of the first two is YES, or NO to the third, the pilot self-grounds. The decision is individual; responsibility lies entirely with the pilot under MED.A.020.

Frequently asked questions on flying common cold pilots

Can I fly with a stuffy nose if I can clear it with Valsalva? Only if symptoms are minimal and the congestion is intermittent. At the first sign of equalisation difficulty, divert or descend.

Does xylometazoline nasal spray help in flight? It is allowed short-term (max 3-5 days), but it is preferable not to fly if you need it to clear your nose. It treats the symptom, not the underlying cause.

How long do I wait after a common cold? At least 24 hours without fever, without significant congestion and without sedating medication. For sinusitis, at least 7-10 days or until complete clinical resolution.

Does the flu vaccine affect flying? Not in general. Mild reactions (short fever, myalgia) may appear in the first 24 hours. Recommendation: schedule the vaccine on an off-duty day.

Do antibiotics affect flying? Usually not, but it depends on the molecule. Macrolides and fluoroquinolones require a 48-hour ground trial. Plus, the antibiotic treats an infection — the infection itself may justify unfit status.

Can I use an oral spray with xylometazoline or menthol in flight? Not recommended. The vasoconstrictor effect can be unpredictable at altitude and menthol may trigger vasovagal reactions. Prefer simple glycerin lozenges.

Practical pre-flight strategies for cold and allergy seasons

Five operational tactics significantly reduce the frequency of self-grounding during the cold or allergy season. They are simple measures, but very rarely implemented systematically.

• Yearly flu vaccination: significantly reduces the incidence of severe influenza in pilots. Book at least 2 weeks before the intensive transport season starts.
• Saline nasal spray at end of duty: irrigation with saline after long flights reduces mucosal dryness and the incidence of recurrent infections.
• Personal stock of in-flight permitted medication: paracetamol, ibuprofen, non-sedating antihistamine after ground trial, saline nasal spray. Avoid panic purchases at the pharmacy while already symptomatic.
• Prophylaxis plan for allergic rhinitis: non-sedating antihistamine + corticosteroid nasal spray started 2 weeks before the season. Prevention works far better than reactive treatment.
• Increased hydration on high-altitude flights — cabin air humidity is below 20%. Water at hand in the cockpit reduces mucosal dryness and mild irritative congestion.

For pilots with chronic allergy, skin-prick testing and an immunotherapy (desensitisation) plan are valuable long-term options. Subcutaneous or sublingual immunotherapy is compatible with flying, but the first dose needs a 24-48 hour ground trial due to the risk of a systemic allergic reaction.

For high-pollen seasons, a daily symptom diary helps calibrate the pre-flight call. A simple 0-10 scale on three criteria — congestion, eyes, general state — allows a quick decision on high-pollen days: cumulative score below 6 = compatible with flying, above 6 = re-assess.

Conclusion

Flying common cold pilots is an individual decision based on specific symptoms, not on a general subjective feeling. Acute viral cold with congestion, fever or sedating medication means self-grounding. Seasonal allergy controlled with a non-sedating antihistamine and a topical corticosteroid nasal spray is, in general, compatible with flight after a ground trial. IMSAFE remains the universal decision tool and responsibility lies with the pilot under MED.A.020.

How LaMed Clinic helps with the fit-to-fly decision

The decision whether to fly or self-ground during a cold or seasonal allergy episode is sometimes difficult. At LaMed Clinic we provide the framework for a correct decision, both pre-flight and for underlying treatment.

Through the LaMed contact form you can obtain:

• Fast AME consult for fit-to-fly evaluation during acute cold or allergy episodes.
• Treatment plan for seasonal allergic rhinitis compatible with flying (non-sedating antihistamine + corticosteroid nasal spray).
• Personalised IMSAFE self-assessment guide for your type of activity (commercial, general aviation, instructor).
• Support for reporting any chronic medication to the Romanian aeromedical authority.

All enquiries are treated confidentially. A single message via the LaMed contact page is enough to start.

Official sources and references

1. EASA — Use of Medication in the Aviation Environment — Advice for AMEs.

2. EASA — Regulation (EU) 1178/2011, Part-MED, MED.A.020.

3. UK CAA — Medical conditions and aircrew duties (cold, sinusitis, ENT).

4. ICAO Doc 8984 — Manual of Civil Aviation Medicine, ENT and respiratory.

5. PAC-MED edition 1 (2026), Romanian aeromedical procedure.

6. EUR-Lex — consolidated Regulation (EU) 1178/2011.

Disclaimer

This material is informative and educational in nature. It does not constitute medical advice, aeromedical evaluation or a certification decision. The fit-to-fly decision lies with the pilot under MED.A.020 and is made, where appropriate, together with the accredited AME.