Diphenylpyraline
(Redirected from Hystryl)
Diphenylpyraline (also known as DPP or Hispril) is a first-generation antihistamine with anticholinergic properties. It is used primarily to treat allergic reactions and common cold symptoms.
Pharmacology[edit | edit source]
Diphenylpyraline is a H1 receptor antagonist, which means it works by blocking the action of histamine, a substance in the body that causes allergic symptoms. It is a member of the ethanolamine class of antihistaminergic agents.
Medical uses[edit | edit source]
Diphenylpyraline is used to relieve red, irritated, itchy, watery eyes; sneezing; and runny nose caused by hay fever, allergies, or the common cold. It is also used to relieve the symptoms of urticaria (hives).
Side effects[edit | edit source]
Like other first-generation antihistamines, diphenylpyraline can cause a variety of side effects, including drowsiness, dizziness, dry mouth/nose/throat, headache, upset stomach, constipation, or trouble sleeping.
Contraindications[edit | edit source]
Diphenylpyraline should not be used in patients with hypersensitivity to diphenylpyraline or other antihistamines of similar chemical structure. It is also contraindicated in patients with narrow-angle glaucoma, peptic ulcer, prostatic hypertrophy, and bladder neck obstruction.
See also[edit | edit source]
References[edit | edit source]
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