Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Black cumin (Nigella sativa), also known as black seed or kalonji, has a long history of use in traditional medicine systems such as Unani, Ayurveda, and traditional Arabic and Islamic medicine. Its use for cough and respiratory complaints is well documented in these traditions. Black cumin seeds and their oil have been used as remedies for a variety of ailments, including coughs, asthma, bronchitis, and other respiratory conditions. The traditional rationale is largely based on its observed anti-inflammatory, bronchodilatory, and expectorant properties, which are believed to help soothe the throat and reduce cough.

Some modern studies have investigated the effects of black cumin and its active compounds (notably thymoquinone) on respiratory health, but clinical evidence specifically supporting its use for general cough is limited and not robust. Most available studies are preclinical (animal or cell-based), or focus on asthma and allergic airway inflammation rather than cough per se. Nonetheless, these studies do indicate anti-inflammatory, antioxidant, and mild bronchodilatory effects, which may indirectly support its traditional use for cough. In summary, while there is significant traditional use and some preliminary scientific rationale, high-quality clinical evidence is currently lacking.

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