The ingredients for Halls Mentholyptus Extra Strong 32g in the UK typically include sugar, glucose syrup, flavourings (including menthol and eucalyptus oil), and acids such as lactic acid and citric acid. Acidity regulators like sodium lactate and potassium citrates may also be present. Some variations, particularly sugar-free ones, will contain sweeteners like isomalt, aspartame, and acesulfame K instead of sugar and glucose syrup. Regarding allergens, the presence of specific substances depends on the product variation and manufacturing location. Some sugar-free versions contain aspartame, which is a source of phenylalanine, and may not be suitable for those with phenylketonuria (PKU). For some international variants, particularly sugar-free cough drops in North America, soy lecithin is used, making them unsuitable for those with soy allergies. While typically free from common allergens like gluten and dairy, cross-contamination is possible, and it is best to check the product label for the most accurate allergen information. Excessive consumption of the sugar-free version may also have a laxative effect. The sweets are generally suitable for vegetarians