Bronchostop Cough pastilles are traditionally used to relieve any cough: dry, tickly, chesty, mucus or catarrh. Available now in this On-the-go pastille format. This non-drowsy, alcohol free product is ideal for daily use to let you focus on life and Bronchostop to focus on the treatment. Buttercup Bronchostop Cough Pastilles contain thyme herb extract. A traditional herbal medicinal product for use in the relief of coughs, such as chesty coughs and dry, tickly, irritating coughs and catarrh, exclusively based upon long-standing use as a traditional remedy.