Davis's Drug Guide

diphenhydrAMINE

Assessment

• Diphenhydramine has multiple uses. Determine why the medication was ordered and assess symptoms that apply to the individual patient.Geri: Appears in the Beers list. May cause sedation and confusion due to increased sensitivity to anticholinergic effects. Monitor carefully, assess for confusion, delirium, other anticholinergic side effects and fall risk. Institute measures to prevent falls



Prevention and Treatment of Anaphylaxis

• Assess for urticaria and for patency of airway



Allergic Rhinitis

• Assess degree of nasal stuffiness, rhinorrhea, and sneezing



Parkinsonism and Extrapyramidal Reactions

• Assess movement disorder before and after administration



Insomnia

• Assess sleep patterns



Motion Sickness

• Assess nausea, vomiting, bowel sounds, and abdominal pain



Cough Suppressant

• Assess frequency and nature of cough, lung sounds, and amount and type of sputum produced. Unless contraindicated, maintain fluid intake of 1500–2000 ml daily to decrease viscosity of bronchial secretions



Pruritus

• Assess degree of itching, skin rash, and inflammation



Lab Test Considerations

• Diphenhydramine may decrease skin response to allergy tests. Discontinue 4 days before skin testing



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