German chamomile is used in herbal medicine for a sore stomach, irritable bowel syndrome, and as a gentle sleep aid.
Chamomilla recutita is also used as a mild laxative and is anti-inflammatory and bactericidal. It can be taken as an herbal tea, two teaspoons of dried flower per cup of tea, which should be steeped for 10 to 15 minutes while covered to avoid evaporation of the volatile oils. The marc should be pressed because of the formation of a new active principle inside the cells, which can then be released by rupturing the cell walls, though this substance only forms very close to boiling point. For a sore stomach, some recommend taking a cup every morning without food for two to three months. It has been studied as a mouthwash against oralmucositis and may have acaricidal properties against certain mites, such as Psoroptes cuniculi.
One of the active ingredients of its essential oil is the terpenebisabolol. Other active ingredients include farnesene,chamazulene, flavonoids (including apigenin, quercetin, patuletinand luteolin) and coumarin.
Dried chamomile has a reputation (among herbalists) for being incorrectly prepared because it is dried at a temperature above the boiling point of the volatile components of the plant.
Chamomile, a relative of ragweed, can cause allergy symptoms and can cross-react with ragweed pollen in individuals with ragweed allergies. It also contains coumarin, so care should be taken to avoid potential drug interactions, e.g. with blood thinners.
While extremely rare, very large doses of chamomile may cause nausea and vomiting. Even more rarely, rashes may occur. A type-IV allergic reaction with severe anaphylaxis has been reported in a 38-year-old man who drank chamomile tea.
None are recorded.
Matricaria chamomilla (synonym: Matricaria recutita), commonly known as chamomile (also spelled camomile), Italian camomilla, German chamomile, Hungarian chamomile (kamilla), wild chamomile or scented mayweed
Source: Wikipedia, https://en.wikipedia.org/wiki/Matricaria_chamomilla#Uses