Mosby's 2014 Nursing Drug Reference (88 page)

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

cetirizine (Rx,
OTC
)

(se-teer′i-zeen)

All Day Allergy, All Day Allergy Children’s, GNP All Day Allergy, GNP Children’s All Day Allergy, Good Sense All Day Allergy, Good Sense Children’s All Day Allergy, Publix Allergy Children’s, Reactine
, Top Care Children’s All Day Allergy, Zyrtec, Zyrtec Children’s

Func. class.:
Antihistamine (2nd generation, peripherally selective)

Chem. class.:
Piperazine, H
1
-histamine antagonist

Do not confuse:
ZyrTEC
/Xanax/Zantac

ACTION:

Acts on blood vessels, GI, respiratory system by competing with histamine for H
1
-receptor site; decreases allergic response by blocking pharmacologic effects of histamine; minimal anticholinergic, sedative action

USES:

Rhinitis, allergy symptoms, chronic idiopathic urticaria

Unlabeled uses:
Asthma, atopic dermatitis

CONTRAINDICATIONS:

Breastfeeding, newborn or premature infants, hypersensitivity to this product or hydrOXYzine, severe hepatic disease

Precautions:
Pregnancy (B), children, geriatric patients, respiratory disease, angle-closure glaucoma, prostatic hypertrophy, bladder neck obstruction, asthma

DOSAGE AND ROUTES
Calculator
Perennial/seasonal allergic rhinitis or idiopathic urticaria

• Adult and child ≥6 yr:
PO
5-10 mg/day

• Child 2-5 yr:
PO
2.5 mg/day, may increase to 5 mg/day or 2.5 mg bid

• Child 1-2 yr:
PO
2.5 mg/day, may increase to 2.5 mg q12hr

• Geriatric:
PO
5 mg/day, may increase to 10 mg/day

Self-treatment of hay fever/other respiratory allergies

• Adult/adolescent/child ≥6 yr:
PO
10 mg/day;
ORAL SOL
5-10 mg/day

Renal dose/hemodialysis/hepatic dose

• Adult:
PO
CCr 11-31 ml/min, 5 mg/day

Atopic dermatitis (unlabeled)

• Child 6-12 yr:
PO
5-10 mg/day

• Child 1-2 yr:
PO
0.25 mg/kg bid

Available forms:
Tabs 5, 10 mg; syr 5 mg/5 ml, prefilled spoons 1 mg/ml; oral sol 5 mg/ml; liquid-filled caps 10 mg; chew tabs 5, 10 mg

Administer:

• 
Without regard to meals

• 
Caps:
swallow whole, do not break, cut, chew, crush

• 
Chew tabs:
chew before swallowing, may use with or without water

• 
Oral liquid:
use calibrated measuring device

SIDE EFFECTS

CNS:
Headache
, stimulation,
drowsiness
, sedation,
fatigue
, confusion,
blurred vision, tinnitus, restlessness, tremors; paradoxical excitation in children, geriatric patients

GI:
Dry mouth
, increased LFTs, constipation

INTEG:
Rash, eczema, photosensitivity, urticaria

RESP:
Thickening of bronchial secretions
, dry nose, throat

PHARMACOKINETICS

Absorption rapid; onset 1/2 hr; peak 1-2 hr; duration 24 hr; protein binding 93%; half-life decreased in children, increased in renal/hepatic disease

INTERACTIONS

Increase:
CNS depression—alcohol, opiates, sedative/hypnotics, other CNS depressants

Increase:
anticholinergic/sedative effect—MAOIs

Increase:
cetirizine effect—ritonavir

Drug/Food

• 
Food prolongs absorption by 1.7 hr

Drug/Lab Test

False negative:
skin allergy tests

NURSING CONSIDERATIONS
Assess:

• 
Allergy symptoms:
pruritus, urticaria, watering eyes at baseline and during treatment

• 
Respiratory status: rate, rhythm, increase in bronchial secretions, wheezing, chest tightness

• 
Blood studies: LFTs, BUN, creatinine at baseline, periodically

Perform/provide:

• 
Hard candy, gum, frequent rinsing of mouth for dryness

• 
Storage in tight, light-resistant container

Evaluate:

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

Teach patient/family:

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

• 
To avoid driving, other hazardous activity if drowsiness occurs

• 
To avoid alcohol, other CNS depressants, OTC antihistamines

• 
To avoid exposure to sunlight; burns may occur

• 
To use sugarless gum, candy, frequent sips of water to minimize dry mouth

• 
Not to breastfeed

TREATMENT OF OVERDOSE:

Administer diazepam, vasopressors, phenytoin IV

Canada only   Side effects:
italics
= common;
bold
= life-threatening   
Nurse Alert

cetrorelix (Rx)

(set-roe-ree′lix)

Cetrotide

Func. class.:
Gonadotropin-releasing hormone antagonist

Chem. class.:
Synthetic decapeptide

ACTION:

Inhibitor of pituitary gonadotropin secretion; initially increases LH and FSH, induces a rapid suppression of gonadotropin secretion

USES:

For inhibition of premature LH surges in women undergoing controlled ovarian hyperstimulation

Unlabeled uses:
Benign prostatic hyperplasia (BPH), endometriosis

CONTRAINDICATIONS:

Pregnancy (X), breastfeeding, hypersensitivity, latex allergy, renal disease

Precautions:
Geriatric patients

DOSAGE AND ROUTES
Calculator
Single-dose regimen

• Adult:
SUBCUT
3 mg when serum estradiol level at appropriate stimulation response, usually on stimulation day 7; if hCG not given within 4 days after inj of 3 mg cetrorelix, give 0.25 mg daily until day of hCG administration

Multiple-dose regimen

• Adult:
SUBCUT
0.25 mg given on stimulation day 5 (either morning or
evening) or 6 (morning) and continued daily until day hCG is given

BPH (unlabeled)

• Adult (male):
SUBCUT
5 mg bid × 2 days then 1 mg/day

Endometriosis (unlabeled)

• Adult (female):
SUBCUT
3 mg weekly

Available forms:
Inj 0.25, 3 mg

Administer:
SUBCUT route

• 
Attach yellow-marked needle to dilutent syringe, dilute powder by injecting liquid from syringe into vial, leaving syringe on vial; gently swirl until clear, avoid bubbles; withdraw contents of vial back into syringe, replace yellow-marked needle with gray-marked needle

• 
SUBCUT using abdomen, 1 inch away from navel or upper thigh; swab inj area with disinfectant; clean a 2-inch circle and allow to dry; pinch up area between thumb and finger; insert needle 45-90 degrees to surface; if positioned correctly, no blood will be drawn back into syringe; reposition needle without removing it; rotate inj sites

• 
Protect from light

SIDE EFFECTS

CNS:
Headache

CV:
Edema

ENDO:
Ovarian hyperstimulation syndrome, abdominal pain (gyn)

GI:
Nausea, vomiting, diarrhea

INTEG:
Pain on inj; local site reactions, bruising, pruritus

OTHER:
Rapid weight gain

RESP:
Shortness of breath

SYST:
Fetal death, anaphylaxis

PHARMACOKINETICS

Excreted in feces/urine, half-life depends on dosage, metabolized to metabolites, protein binding 86%

NURSING CONSIDERATIONS
Assess:

• 
Serum progesterone, LH; ovarian ultrasound day 7-14; pelvic exam, serum estradiol/gonadotropin; weight

• 
For suspected pregnancy; product should not be used, pregnancy (X)

• 
For latex allergy, product should not be used

 
For anaphylaxis during first inf

Evaluate:

• 
Therapeutic response: pregnancy

Teach patient/family:

• 
To report abdominal pain, vaginal bleeding, nausea, vomiting, diarrhea, SOB, peripheral edema

• 
How to perform self-administration technique if needed

BOOK: Mosby's 2014 Nursing Drug Reference
3.92Mb size Format: txt, pdf, ePub
ads

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