English Ivy (Hedera helix) leaf extract has a long history of traditional use for respiratory support, particularly in Europe. However, its use for the bronchial system—specifically for coughs and mild bronchial conditions—has gained scientific support in recent decades. Several clinical trials and systematic reviews have investigated standardized ivy leaf extracts, finding that they can help reduce cough frequency and improve expectoration in both children and adults with acute bronchitis or productive coughs. The active compounds, particularly saponins like hederacoside C, are believed to have secretolytic (mucus-loosening), bronchodilatory, and anti-inflammatory properties, which can assist in relieving bronchial congestion.

Guidelines in some European countries recognize ivy leaf extract as an option for symptomatic treatment of acute bronchitis. Products containing ivy extract are widely available as over-the-counter syrups and drops. The safety profile is generally considered good, with mild gastrointestinal disturbances being the most commonly reported adverse effects.

While not universally endorsed as a first-line treatment, the weight of evidence from randomized, controlled trials and meta-analyses supports the efficacy and safety of English Ivy extract as an adjunct therapy for mild bronchial conditions. It is important to note that it should not replace medical management for serious respiratory illnesses.