HBOT Contraindications: Who Should NOT Take HBOT

HBOT is one of the safest medical therapies available — but not for everyone. Certain medical conditions make HBOT dangerous, and others require careful screening. Here's the complete list every patient should know.

HBOT is Very Safe — But Not for Everyone

Decades of clinical use have established HBOT as remarkably safe. Serious complications are rare when proper screening and protocols are followed. However, certain medical conditions absolutely preclude HBOT, and others require extra caution.

Every reputable HBOT center conducts thorough pre-screening to identify these conditions. Never hide your medical history from the HBOT team — it's there to keep you safe.

Absolute Contraindications

These conditions make HBOT genuinely dangerous and require avoiding therapy entirely:

• Untreated pneumothorax (collapsed lung): Pressure changes could rupture the lung. Once surgically treated, HBOT may be safe.
• Certain chemotherapy drugs: Bleomycin (lung toxicity), doxorubicin (cardiac toxicity), cisplatin (potentially). Wait period required after last dose.
• Disulfiram (Antabuse): Inhibits oxygen toxicity protection.
• Cis-platinum (during treatment)
• Untreated severe claustrophobia: Not strictly medical, but practically unworkable.

Relative Contraindications

These conditions require careful evaluation — HBOT may be possible with adjustments:

• Severe COPD with air trapping: Risk of barotrauma during depressurization
• Asthma (uncontrolled): Should be well-controlled before HBOT
• Active upper respiratory infection: Wait until resolved
• Active ear infection or recent ear surgery: Wait for clearance
• Untreated diabetes (severe hyperglycemia or hypoglycemia)
• Pregnancy: Generally avoided except for specific severe conditions
• Seizure disorder: Increased seizure risk at higher pressures
• Implanted devices: Pacemakers and other devices must be HBOT-rated
• Severe congestive heart failure
• Recent eye surgery

What to Disclose

Always disclose to your HBOT team:

• All current medications (prescription and OTC)
• All medical conditions, past and present
• Recent surgeries (especially eye, ear, lung)
• Cardiac conditions
• Any implanted devices
• Pregnancy status
• Smoking history
• Diabetes status
• Cancer history (especially with chemotherapy)
• Mental health conditions (especially severe claustrophobia)

Common Side Effects (Not Contraindications)

These are normal experiences, not reasons to avoid HBOT:

• Ear pressure: Most common, easily managed with equalization techniques
• Sinus pressure: Similar to ears
• Temporary myopia (vision change): Especially with long protocols, reverses after treatment
• Fatigue after sessions: Especially early in protocol
• Hunger or thirst
• Mild headache

Stop Therapy If You Experience

During an HBOT session, alert your technician immediately if you experience:

• Severe ear pain that won't resolve
• Tunnel vision or visual disturbances
• Chest pain or shortness of breath
• Severe anxiety or panic
• Twitching or seizure activity
• Sudden ringing in ears
• Numbness or unusual sensations

The technician can pause and slowly depressurize the chamber if needed. Don't try to be brave — communicate any symptoms.

How to Verify a Safe Center

Choose HBOT centers that:

• Conduct thorough pre-screening
• Have medical supervision during sessions
• Use FDA/CE certified chambers
• Follow international safety protocols (UHMS, ECHM)
• Have certified HBOT technicians
• Maintain emergency protocols

Every HBOTRx partner center meets these standards. We carefully verify safety protocols before listing any center.