Last updated: 1-6-2026 | Reviewed by Dr. Chris Jackson, PharmD
If you're on the path to ex-smoker lung recovery, you've likely heard about mullein—the fuzzy-leafed herb that's been used for centuries to support respiratory wellness. But before adding any new supplement to your routine, it's smart to ask: what are the potential side effects?
The good news? Mullein is generally considered safe and well-tolerated by the overwhelming majority of adults. However, like any herbal supplement, it's not without considerations. Here's what you need to know to make an informed decision about incorporating mullein into your lung health journey.
Table of Contents
- What Is Mullein and Why Do People Use It?
- Common Mullein Side Effects to Be Aware Of
- Who Should Avoid Mullein?
- How to Minimize Potential Side Effects
- Frequently Asked Questions
- Conclusion
What Is Mullein and Why Do People Use It?
Mullein (Verbascum thapsus) is a flowering plant native to Europe and Asia that has been used in traditional medicine for over 2,000 years. Today, it's popular among people seeking natural lung detox support and respiratory wellness—especially those working on quit smoking naturally goals.
The mullein benefits stem from its natural compounds, including saponins, flavonoids, and mucilage. These constituents are believed to support natural mucus clearance and promote easy breathing, making mullein for lungs a popular choice for those seeking breathing support after years of smoking.
Dr. Chris Jackson, PharmD and founder of Betterbrand, formulated the Mullein + Chlorophyll Drops after reviewing the research on mullein leaf extract and its traditional uses for respiratory support.
Common Mullein Side Effects to Be Aware Of
While mullein is generally safe, some users report mild side effects:
Digestive Discomfort
Some people experience mild stomach upset, especially when taking mullein on an empty stomach. Taking your supplement with food typically resolves this issue.
Skin Irritation
The fine hairs on mullein leaves can cause contact dermatitis in sensitive individuals. This is primarily a concern with raw plant material rather than processed supplements like third-party tested supplements from reputable brands.
Allergic Reactions
Though rare, some people may be allergic to mullein. If you're allergic to plants in the Scrophulariaceae family, proceed with caution. Signs of an allergic reaction include itching, rash, or difficulty breathing—seek medical attention immediately if these occur.
Mild Throat Irritation
Ironically, some users report initial throat irritation, particularly with teas or tinctures. This typically subsides as the body adjusts.
Who Should Avoid Mullein?
While mullein supports respiratory wellness for many, certain groups should exercise caution:
- Pregnant or nursing women (insufficient safety data)
- Children under 12 without pediatric guidance
- Those taking blood thinners (mullein may have mild anticoagulant properties)
- Anyone scheduled for surgery (discontinue 2 weeks prior)
- Individuals with known allergies to mullein or related plants
Always consult your healthcare provider before starting any new supplement, especially if you're managing smoker's cough relief while on other medications.
How to Minimize Potential Side Effects
To get the respiratory support you're seeking while minimizing risk:
- Start with a lower dose and gradually increase
- Take mullein with food to prevent stomach upset
- Choose quality products from GMP certified facilities
- Look for third-party tested supplements verified by labs like Eurofins Scientific
- Stay hydrated to support clear airways naturally
- Monitor your body's response during the first week
The Betterbrand Mullein + Chlorophyll Drops were studied in a 60-day clinical trial where 81% of participants reported less frequent coughing and 77% reported clearer airways—demonstrating both efficacy and tolerability.
Frequently Asked Questions
Can mullein interact with medications?
Mullein may interact with blood thinners, diabetes medications, and diuretics. While research is limited, it's always best to consult your healthcare provider if you're taking prescription medications. Most people using mullein for lung health after quitting experience no interactions, but individual circumstances vary.
How long does it take for mullein side effects to appear?
If side effects occur, they typically appear within the first few days of use. Digestive discomfort usually presents within hours of taking the supplement, while allergic reactions can occur within minutes to hours. If you experience no adverse effects after the first week, you're unlikely to develop them later.
Is mullein safe for long-term use?
Current research suggests mullein is safe for extended use in healthy adults, though long-term studies beyond several months are limited. Many people incorporate mullein into their daily routine as part of ongoing lung repair after smoking efforts. Betterbrand offers a 365-day money-back guarantee, giving you peace of mind as you discover what works for your body.
Can I take mullein with other lung support supplements?
Many people combine mullein with complementary ingredients. For example, mullein chlorophyll drops pair these two ingredients for enhanced respiratory support. NAC, elderberry, and maritime pine bark are other popular combinations found in comprehensive formulas like BetterLungs Capsules. As always, introduce new supplements one at a time to identify any sensitivities.
What's the difference between mullein tea and mullein drops for side effects?
The delivery method can affect your experience. Mullein teas are gentler but less concentrated, while tinctures and drops offer faster absorption and more precise dosing. The smoker's lung detox benefits are similar, but drops may be easier on sensitive stomachs since they bypass extensive digestion.
Conclusion
For most people, mullein is a safe, well-tolerated herb that supports respiratory wellness with minimal side effects. The key is choosing high-quality, third-party tested supplements and listening to your body's response.
If you're ready to support your ex-smoker lung recovery journey with mullein, Betterbrand offers several options formulated by Dr. Chris Jackson, PharmD. From Mullein + Chlorophyll Drops (clinically studied for cough and mucus) to BetterLungs Capsules and Mullein Gummies, there's a format to fit your lifestyle—all backed by a 365-day money-back guarantee and trusted by over 836,000 customers.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement.
Sources
- National Center for Complementary and Integrative Health - Mullein - Overview of mullein safety and traditional uses
- Memorial Sloan Kettering Cancer Center - Mullein - Clinical information on mullein interactions and side effects
- Mount Sinai Health Library - Mullein - Medical overview of mullein uses and precautions
- Phytotherapy Research Journal - Peer-reviewed research on herbal medicine efficacy