Lily-of-the-valley - Qvar (Beclomethasone dipropionate) Interaction
Herbal: Lily-of-the-valley
Also Known As: Convallaria majalis, Clochette des Bois, Constancy, Convallaria, Convallaria Herba, Convall-Lily, Gazon de Parnasse, Jacob's Ladder, Ladder-To-Heaven, Lily, Lirio de los Valles, Lis des Vallées, Lys des Vallées, May Bells, May Lily, Muguet, Muguet de Mai
Drug: Beclomethasone dipropionate
Brand names:
Qvar, QNASL

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 04, 2025
Interaction Details
Beclomethasone dipropionate is classified as belonging to the following category: Corticosteroids
Theoretically, using lily-of-the-valley with prolonged corticosteroid therapy can cause cardiac glycoside toxicity.
Lily-of-the-valley contains cardiac glycosides. Concomitant, long-term corticosteroid use can increase the risk of cardiac glycoside toxicity due to potassium depletion and electrolyte imbalance.
Interaction Rating
Likelihood of Occurrence
ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
References
- Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
Lily-of-the-valley Overview

Beclomethasone dipropionate Overview
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Beclomethasone is used to prevent difficulty breathing, chest tightness, wheezing, and coughing caused by asthma in adults and children 5 years of age and older. It belongs to a class of medications called corticosteroids. It works by decreasing swelling and irritation in the airways to allow for easier breathing.
Lily-of-the-valley - More Interactions
Lily-of-the-valley interacts with 157 drugs
Interaction Rating Key
These severity listings are for informational use only. Never start, stop or otherwise change your therapy before speaking with your provider.
Major | The combined use of these agents is strongly discouraged as serious side effects or other negative outcomes could occur. |
Moderate | Use cautiously under the care of a healthcare professional or avoid this combination. A significant interaction or negative outcome could occur. |
Minor | Be aware that there is a chance of an interaction. Watch for warning signs of a potential interaction. |
Unknown | No interactions have been reported or no interaction data is currently available. |
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Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
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Drug descriptions are provided by MedlinePlus.