Antihistamines, Decongestants, Antitussives, and Expectorants Flashcards
Dextromethorphan (Robitussin)
Chemical Classification
Levorphanol derivative
Dextromethorphan (Robitussin)
Functional Classification
Antitussive, nonopioid
Dextromethorphan (Robitussin)
Mechanism of Action
Depresses cough center in medulla by direct effect
Dextromethorphan (Robitussin)
Uses
Nonproductive cough caused by colds or inhaled irritants
Dextromethorphan (Robitussin)
Contraindications
Hypersensitivity
Dextromethorphan (Robitussin)
Side Effects
CNS: Dizziness, sedation, confusion, ataxia, fatigue
GI: Nausea
Dextromethorphan (Robitussin)
Nursing Considerations
ASSESS:
-COUGH: type, frequency, character, including sputum
PERFORM/PROVIDE:
- Increased fluids to liquify secretions
- Humidification of patient’s room
Diphenhydramine (Benadryl)
Functional Classification
Antihistamine (1st generation, nonselective)
Diphenhydramine (Benadryl)
Chemical Classification
Ethanolamine derivative, H1-receptor antagonist
Diphenhydramine (Benadryl)
Mechanism of Action
Acts on blood vessels, GI, respiratory system by competing with histamine for H1-receptor site; decreases allergic response by blocking histamine
Diphenhydramine (Benadryl)
Uses
Allergy symptoms, rhinitis, motion sickness, antiparkinsonism, nighttime sedation, infant colic, nonproductive cough, insomnia in children
Diphenhydramine (Benadryl)
Contraindications
Hypersensitivity to H1-receptor antagonist, acute asthma attack, lower respiratory tract disease, neonates
Diphenhydramine (Benadryl)
Side Effects
CNS: Dizziness, Drowsiness, poor coordination, fatigue, anxiety, euphoria, confusion, paresthesia, neuritis, SEIZURES
CV: hypotension, palpitations
EENT: blurred vision, dilated pupils, tinnitus, nasal stuffiness, dry nose, throat, mouth
GI: nausea, anorexia, diarrhea
GU: Retention, dysuria, frequency
HEMA: THROMBOCYTOPENIA, AGRANULOCYTOSIS, HEMOLYTIC ANEMIA
INTEG: photosensitivity
MISC: ANAPHYLAXIS
RESP: increased thick secretions, wheezing, chest tightness
Diphenhydramine (Benadryl)
Nursing Considerations
ASSESS:
- urinary retention, frequency, dysuria; product should be discontinued
- CBC during long-term therapy; blood dyscrasias may occur
- Respiratory status: rate, rhythm, increase in bronchial secretions, wheezing, chest tightness
Diphenhydramine (Benadryl)
Overdose Treatment
Administer diazepam, vasopressors, phenytoin IV