Mosby's 2014 Nursing Drug Reference (134 page)

BOOK: Mosby's 2014 Nursing Drug Reference
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Canada only   Side effects:
italics
= common;
bold
= life-threatening   
Nurse Alert

diphenhydrAMINE (
OTC
, Rx)

(dye-fen-hye′dra-meen)

Allerdryl
, AllerMax
, Altaryl, Banophen, Benadryl, Benadryl Allergy, Benadryl Allergy Dye Free, Benadryl Children’s Allergy, Buckley’s Bedtime, Diphedryl, Diphenhist, Dytan, ElixSure Allergy, Equaline Allergy, Equaline Children’s Allergy, Equate Allergy, Equate Children’s Allergy, Genahist, Good Sense Children’s Allergy Relief, Good Sense Diphedryl, Leader Complete Allergy, Nytol, PediaCare Children’s Allergy, PediaCare Nighttime Cough, Q-Dryl Allergy, Select Brand Allergy, Siladryl, Silphen, Simply Sleep, Sleepinal, Sleep Tabs, Sominex, Top Care Allergy, Top Care Children’s Allergy, Unisom
, Valu-Dryl, Wal-dryl Allergy, Wal-dryl Allergy Dye Free, Wal-dryl Children’s Allergy, Walgreen’s Sleep Aid, Walgreen’s Sleep II, Wal-Som

Func. class.:
Antihistamine (1st generation, nonselective)

Chem. class.:
Ethanolamine derivative, H
1
-receptor antagonist

Do not confuse:
diphenhydrAMINE
/dicyclomine
diphenhydrAMINE
/dimenhyDRINATE

ACTION:

Acts on blood vessels, GI, respiratory system by competing with histamine for H
1
-receptor site; decreases allergic response by blocking histamine

USES:

Allergy symptoms, rhinitis, motion sickness, antiparkinsonism, nighttime sedation, infant colic, nonproductive cough, insomnia in children

Unlabeled uses:
Nystagmus

CONTRAINDICATIONS:

Hypersensitivity to H
1
-receptor antagonist, acute asthma attack, lower respiratory tract disease, neonates

Precautions:
Pregnancy (B), breastfeeding, children <2 yr, increased intraocular pressure, cardiac/renal disease, hypertension, bronchial asthma, seizure disorder, stenosed peptic ulcers, hyperthyroidism, prostatic hypertrophy, bladder neck obstruction

DOSAGE AND ROUTES
Calculator

• Adult and child >12 yr: PO
25-50 mg q4-6hr, max 300 mg/day;
IM/IV
10-50 mg, max 300 mg/day

• Child 6-12 yr: PO/IM/IV
5 mg/kg/day in 4 divided doses, max 300 mg/day

Nighttime sleep aid

• Adult and child ≥12 yr: PO
25-50 mg at bedtime

Antitussive (syrup only)

• Adult and child ≥12 yr: PO
25 mg q4hr, max 150 mg/24 hr

• Child 6-12 yr: PO
12.5 mg q4hr, max 75 mg/24 hr

Renal disease


 
CCr >50 ml/min, dose q6hr; CCr 10-50 ml/min, dose q6-12hr; CCr <10 ml/min, dose q12-18hr

Peripheral vestibular nystagmus (unlabeled)


Adult: PO
25-50 mg q4-6hr up to 48 hr

Available forms:
Caps 25, 50 mg; tabs 25, 50 mg; chew tabs 12.5 mg; elix 12.5 mg/5 ml; syr 12.5 mg/5 ml; inj 10, 50 mg/ml; orally disintegrating tabs 12.5, 25 mg

Administer:

 
Avoid use in children <2 yr; death has occurred; overdose has occurred with topical gel taken orally (adult/child)

• 
With meals for GI symptoms; absorption rate may slightly decrease

• 
At bedtime only if using for sleep aid

IM route

• 
Deep IM in large muscle; rotate site

Direct IV route

• 
Undiluted; give 25 mg/min or less

Intermittent IV INF route

• 
Dilute with 0.9% NaCl, 0.45% NaCl, D
5
W, 0.9% NaCl, D
10
W, LR, Ringer’s

Syringe compatibilities:
Atropine, butorphanol, chlorproMAZINE, cimetidine, dimenhyDRINATE, droperidol, fentaNYL, fluPHENAZine, glycopyrrolate, HYDROmorphone, hydrOXYzine, meperidine, metoclopramide, midazolam, morphine, nalbuphine, pentazocine, perphenazine, prochlorperazine, promazine, promethazine, ranitidine, scopolamine, SUFentanil

Y-site compatibilities:
Abciximab, aldesleukin, alfentanil hydrochloride, amifostine, amikacin sulfate, aminocaproic acid, amphotericin B lipid complex (Abelcet), amphotericin B liposome (AmBisome), amsacrine, anidulafungin, argatroban, ascorbic acid injection, atenolol, atracurium besylate, atropine sulfate, azithromycin, benztropine mesylate, bivalirudin, bleomycin, bumetanide, buprenorphine, butorphanol, calcium chloride/gluconate, CARBOplatin, caspofungin, cefTAZidime, ceftizoxime, chlorproMAZINE, cimetidine, ciprofloxacin, cisatracurium, CISplatin, cladribine, clindamycin, codeine, cyanocobalamin, cyclophosphamide, cycloSPORINE, cytarabine, DACTINomycin, DAPTOmycin, digoxin, diltiazem, DOBUTamine, docetaxel, DOPamine, doripenem, doxacurium, DOXOrubicin, DOXOrubicin liposomal, doxycycline, enalaprilat, ePHEDrine, EPINEPHrine, epirubicin, epoetin alfa, eptifibatide, ertapenem, erythromycin, esmolol, etoposide, famotidine, fenoldopam, fentaNYL, filgrastim, fluconazole, fludarabine, folic acid, gallium, gatifloxacin, gemcitabine, gemtuzumab, gentamicin, glycopyrrolate, granisetron, HYDROmorphone, hydrOXYzine, IDArubicin, ifosfamide, imipenem-cilastatin, irinotecan, isoproterenol, labetalol, levofloxacin, lidocaine, linezolid, LORazepam, LR, magnesium sulfate, mannitol, mechlorethamine, melphalan, meperidine, meropenem, metaraminol, methadone, methicillin, methotrexate, methoxamine, methyldopate, metoclopramide, metoprolol, metroNIDAZOLE, miconazole, midazolam, minocycline, mitoXANtrone, morphine, multiple vitamins injection, mycophenolate, nalbuphine, naloxone, nesiritide, netilmicin, nitroglycerin, norepinephrine, octreotide, ondansetron, oxaliplatin, oxytocin, PACLitaxel, palonosetron, pamidronate, pancuronium, papaverine, PEMEtrexed, penicillin G potassium/sodium, pentamidine, pentazocine, phenylephrine, phytonadione, piperacillin, piperacillin-tazobactam, polymyxin B, potassium chloride, procainamide, prochlorperazine, promethazine, propofol, propranolol, protamine, pyridoxine, quiNIDine, quinupristin-dalfopristin, ranitidine, remifentanil, Ringer’s, ritodrine, riTUXimab, rocuronium, sargramostim, sodium acetate, succinylcholine, SUFentanil, tacrolimus, teniposide, theophylline, thiamine, thiotepa, ticarcillin, ticarcillin-clavulanate, tigecycline, tirofiban, TNA, tobramycin, tolazoline, TPN, trastuzumab, trimetaphan, urokinase, vancomycin, vasopressin, vecuronium, verapamil, vinCRIStine, vinorelbine, vitamin B complex/C, voriconazole, zoledronic acid

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

PHARMACOKINETICS

Metabolized in liver, excreted by kidneys, crosses placenta, excreted in breast milk, half-life 2-7 hr

PO:
Peak 1-3 hr, duration 4-7 hr

IM:
Onset 1/2 hr, peak 1-4 hr, duration 4-7 hr

IV:
Onset immediate, duration 4-7 hr

INTERACTIONS

Increase:
CNS depression—barbiturates, opiates, hypnotics, tricyclics, alcohol

Increase:
diphenhydrAMINE effect—MAOIs

Drug/Lab Test

False negative:
skin allergy tests

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

• 
Product should be discontinued 4 days before skin allergy tests

• 
Storage in tight container at room temp

Evaluate:

• 
Therapeutic response: absence of running or congested nose or rashes, improved sleep

Teach patient/family:

• 
About all aspects of product use; to notify prescriber of confusion, sedation, hypotension

• 
To avoid driving, other hazardous activity if drowsiness occurs

• 
That photosensitivity may occur

• 
To avoid concurrent use of alcohol, other CNS depressants

• 
To avoid breastfeeding;
not to breastfeed (injectable)

• 
To use hard candy, gum, frequent rinsing of mouth for dryness

TREATMENT OF OVERDOSE:

Administer diazepam, vasopressors, phenytoin IV

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