Scientists agree that chamomile is not toxic and does not show teratogenic properties (it does not damage the fetus).
On the other hand, the literature data on chamomile allergenicity are contradictory. It is known that any plant containing biologically active substances can cause unwanted immune reactions. And indeed – there are known cases (very few) of allergies and anaphylactic shock after using chamomile in people who are additionally allergic to chrysanthemums or asters. On the other hand, other reports even prove that chamomile has an anti-allergic effect, which is based on its antihistamine properties.
Although chamomile was finally qualified by the FDA (Food and Drug Administration) as a safe raw material, it is still worth being cautious when administering it to children, pregnant women and people with a positive family history of allergies.