Medical Disclaimer

Last Updated: December 17, 2025

1. Educational and Wellness Tool—Not Medical Advice

PropranololGuide.org provides educational wellness tools designed to help users understand their prescribed propranolol medication for situational stress management. Our services are intended to support relaxation and stress management—a general wellness purpose recognized under the FDA General Wellness Policy.

This website and its tools do not provide medical advice. The information, visualizations, and content provided through our Calculator and website:

• Do not constitute medical advice, diagnosis, or treatment recommendations
• Do not replace the professional judgment of your healthcare provider
• Are not intended to diagnose, treat, cure, or prevent any disease or medical condition
• Should not be used as the basis for any medical decision without consulting a licensed healthcare provider

The Calculator visualizes pharmacokinetic data from published research to help you understand general absorption patterns. It does not tell you what medication to take, how much to take, or when to take it. Those decisions belong to you and your healthcare provider.

2. Prescription Medication Acknowledgment

Propranolol is a prescription medication that requires evaluation and authorization from a licensed healthcare provider. By using our tools, you acknowledge and represent that:

• You understand propranolol is a prescription medication
• If you currently use propranolol, it was prescribed to you by a licensed healthcare provider
• You will follow your prescriber's instructions regarding your medication
• You will consult your healthcare provider before making any changes to how you take your medication
• If you do not have a prescription for propranolol, you will consult a healthcare provider before obtaining or using this medication

Our tools are designed to supplement—never replace—the guidance you receive from your healthcare provider. Your prescriber knows your medical history, current health status, other medications, and individual circumstances in ways that no website or calculator can replicate.

3. Propranolol-Only Tool Restriction

The pharmacokinetic data, absorption curves, and timing visualizations in our Calculator are based on peer-reviewed research specific to propranolol. This information does not apply to:

• Other beta-blockers, including but not limited to:
  • Atenolol (Tenormin)
  • Metoprolol (Lopressor, Toprol-XL)
  • Bisoprolol (Zebeta)
  • Nadolol (Corgard)
  • Carvedilol (Coreg)
  • Timolol
  • Any other beta-adrenergic blocking agent
• Any other medication of any drug class
• Any substance not prescribed by your healthcare provider
• Modified-release propranolol formulations unless specifically selected within the Calculator

Why This Restriction Matters

Different beta-blockers have fundamentally different pharmacological properties:

• Half-lives vary significantly: Propranolol has a half-life of approximately 3-6 hours for immediate-release formulations, while atenolol has a half-life of 6-9 hours and nadolol can exceed 20 hours.
• Absorption patterns differ: Each beta-blocker has unique absorption characteristics that affect when peak plasma concentration occurs.
• Lipophilicity varies: Propranolol is highly lipophilic (fat-soluble) and crosses the blood-brain barrier readily, while other beta-blockers like atenolol are hydrophilic and have different central nervous system effects.
• Receptor selectivity differs: Propranolol is a non-selective beta-blocker, while others like metoprolol are cardioselective.

Consequences of Cross-Application

If you apply this Calculator's output to ANY medication other than the propranolol formulation you have been prescribed:

• The results will be scientifically invalid
• You may experience unexpected medication effects
• You could harm yourself due to incorrect timing assumptions
• PropranololGuide.org accepts no responsibility for any outcomes
• You assume all risk entirely

Do not use this tool for any medication other than propranolol. If you take a different beta-blocker, this Calculator cannot help you, and attempting to use it could be dangerous.

4. Not a Medical Device

Our Calculator is classified as a general wellness product intended for stress management support. It is:

• Not a medical device as defined by the Federal Food, Drug, and Cosmetic Act
• Not evaluated, cleared, or approved by the U.S. Food and Drug Administration (FDA) or any other regulatory body as a medical device
• Not intended to be used in the diagnosis, cure, mitigation, treatment, or prevention of any disease
• Not clinical decision support software that provides patient-specific recommendations

The Calculator visualizes published pharmacokinetic research to help users understand general patterns of propranolol absorption. This educational function does not make the tool a medical device.

5. Individual Variation and Limitations

The visualizations and information provided by our Calculator are based on population-average data from published pharmacokinetic studies. Your individual response to propranolol may differ significantly from these averages due to:

• Individual metabolic differences (genetic variations in CYP2D6 and other enzymes)
• Age, weight, and body composition
• Liver and kidney function
• Food intake and timing relative to medication
• Interactions with other medications or substances
• Health conditions affecting drug absorption or metabolism
• Hydration status
• Time of day and circadian factors
• Stress levels and physical activity

The Calculator cannot predict your personal response. It shows what typically happens in study populations—not what will happen in your specific body. Always defer to your own experience and your healthcare provider's guidance over any visualization or estimate.

6. Potential Risks and Contraindications

Propranolol, like all medications, carries potential risks. This website does not provide comprehensive safety information—your prescriber and pharmacist are your sources for complete prescribing information. However, you should be aware that propranolol:

• Can cause serious side effects including severely low blood pressure, very slow heart rate, and difficulty breathing
• Is contraindicated (should not be used) in certain conditions, including severe bradycardia, heart block greater than first degree, cardiogenic shock, uncompensated heart failure, and certain other conditions
• May interact dangerously with other medications including other blood pressure medications, certain antidepressants, and many other drugs
• Should not be stopped abruptly after regular use without medical supervision
• May mask symptoms of low blood sugar in people with diabetes
• May affect your ability to drive or operate machinery

If you experience any concerning symptoms after taking propranolol, contact your healthcare provider or seek emergency medical attention immediately.

7. Overdose Warning and Emergency Information

What To Do If Overdose Is Suspected

1. Call emergency services immediately:
   • United States: 911
   • United Kingdom: 999
   • European Union: 112
   • Australia: 000
   • Canada: 911
2. Contact Poison Control:
   • United States: 1-800-222-1222 (Poison Control Center)
   • United Kingdom: Contact NHS 111 or your local emergency department
3. Do not wait for symptoms to appear. Propranolol overdose effects may be delayed, and early treatment significantly improves outcomes.
4. If possible, have the medication bottle available to provide information to emergency responders.

PropranololGuide.org provides information for educational purposes related to understanding your prescribed medication. We do not provide information intended for non-therapeutic purposes, and our tools are not designed to assist with determining quantities, timing, or methods for any use other than the lawful, prescribed therapeutic use of propranolol for situational stress management.

8. Limitation of Liability

To the maximum extent permitted by applicable law, PropranololGuide.org, its owners, operators, affiliates, and contributors:

• Disclaim all liability for any direct, indirect, incidental, consequential, special, or punitive damages arising from:
  • Your use of or inability to use our website or tools
  • Any decisions you make based on information from our website or tools
  • Any health outcomes, adverse events, or injuries related to propranolol or any other medication
  • Any application of our Calculator's output to medications other than propranolol
  • Any misuse of our tools or information
  • Any reliance on our website or tools as a substitute for professional medical advice
• Make no warranties regarding:
  • The accuracy, completeness, or reliability of any information provided
  • The suitability of our tools for any particular purpose
  • The availability or uninterrupted operation of our website or tools

Your use of PropranololGuide.org is at your own risk. You assume full responsibility for any decisions you make regarding your health and medication use.

9. Healthcare Provider Relationship

PropranololGuide.org is not a healthcare provider. We do not:

• Establish a doctor-patient or provider-patient relationship with users
• Prescribe medications
• Provide individualized medical recommendations
• Maintain medical records
• Offer medical consultations

Our tools may help facilitate connections with telehealth providers who can evaluate whether propranolol is appropriate for you. Any relationship you establish with such providers is between you and them—not with PropranololGuide.org. We are not responsible for the care, advice, or prescriptions provided by any healthcare provider, including those you may find through our website.

10. Changes to This Disclaimer

We may update this Medical Disclaimer from time to time to reflect changes in our practices, legal requirements, or for other operational, legal, or regulatory reasons. We will post the updated disclaimer on this page with a revised "Last Updated" date. Your continued use of our website and tools after any changes constitutes acceptance of the updated disclaimer.

11. Contact Information

If you have questions about this Medical Disclaimer, please contact us:

Email: [email protected]

Mailing Address:
Jack Maher, Founder & CEO
PropranololGuide.org
Republic of Ireland