Neem has antihistamine properties that help inhibit allergic reactions when applied externally or consumed as a decoction.
Neem inhibits allergic reactions when applied externally or consumed internally. Neem compounds inhibit the stimulus produced by histamine and may helpful in skin rashes and bronchial allergy. Application of a neem-based cream or lotion will stop the itching and inflammation of rashes and other topical allergic reaction. For the general malaise of allergies such as aches, pains and tiredness, neem tea may be taken internally. If there are problems with air passages, neem tea mixed with inhaling the vapors of boiled neem leaves will counteract the allergies effects and help clear air passages.