
Side effects: Problems that occur when treatment goes beyond the desired effect. Or problems that occur in addition to the desired therapeutic effect.

Antihistamines reduce itching and swelling and dry up secretions from the nose, eyes, and throat. Mast cell tumors are tumors involving cells which contain granules of histamine. Patients with mast cell tumors experience chronic inflammatory symptoms due to circulating histamine. Antihistamines such as diphenhydramine may be helpful given long term though hydroxyzine could also be used.

See the entire definition of Glaucoma

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