Medications

Question 1

For Diphenhydramine:

How

Answer 1

Antihistamine or an·ti·his·ta·mine

Question 2

For Diphenhydramine:

Classification

Answer 2

Antihistamine or an·ti·his·ta·mine

Question 3

For Diphenhydramine:

Trade Name

Answer 3

Benadryl

Question 4

For Diphenhydramine:

Desired Effects

Answer 4

Blocks histamine effects in allergic reactions (Stop an attack).

Question 5

For Diphenhydramine:

Mechanism of Action

Answer 5

Blocks cellular histamine response.

Question 6

For Diphenhydramine:

Indications

Answer 6

• Allergic reactions
• Adjunct to epinephrine in anaphylactic shock
• Dystonic reactions to phenothiazines

Question 7

For Diphenhydramine:

Adverse Reactions

Answer 7

• Dizziness
• Drowsiness / sedation
• Blurring of vision
• Dry mouth
• Wheezing
• Palpations
• Hypotension

Question 8

For Diphenhydramine:

Contraindictions

Answer 8

• Patients experiencing anticholinergic syndrome
• Narrow angle glaucoma (acute)
• MAO inhibitors
• Pregnancy
• Prostate Enlargement
• Ulcer with symptoms of obstruction

Question 9

For Diphenhydramine:

Drug Interactions

Answer 9

• Ethanol
• Anticholinergic drugs
• Cannot be mixed with methylprednisolone

Question 10

For Diphenhydramine:

Precautions

Answer 10

• Asthma (may thicken secretions)

Question 11

For Diphenhydramine:

Special Considerations

Answer 11

In life-threatening anaphylactic reactions epinephrine should be given as the first-line medication.

Question 12

For Diphenhydramine:

Dosing Regiem

Answer 12

• Adult – 25 mg IVP or 50 mg IM
• Pediatric Allergic Reactions - 1mg/kg (max dose 50mg) IVP or IM
• Pediatric Chemical Restraint - 1mg/kg (max dose 25mg) IVP or IM

Question 13

For Diphenhydramine:

Protocol Location

Answer 13

• Allergic Reaction & Anaphylactic Shock
• Psychiatric Emergencies – Chemical Restraint