Mosby's 2014 Nursing Drug Reference (140 page)

BOOK: Mosby's 2014 Nursing Drug Reference
3.67Mb size Format: txt, pdf, ePub
ads

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

dorzolamide
(ophthalmic)

(dor-zole′ah-mide)

Trusopt

Func. class.:
Antiglaucoma

Chem. class.:
Carbonic anhydrase inhibitor

ACTION:

Decreases aqueous humor secretion by decreasing bicarbonate, thus decreasing IOP

USES:

For the treatment of elevated intraocular pressure in patients with ocular hypertension or open-angle glaucoma

CONTRAINDICATIONS:

Hypersensitivity

Precautions:
Hypersensitivity to sulfonamides, hepatic/renal disease, angle-closure glaucoma, electrolyte disturbances

DOSAGE AND ROUTES
Calculator
Elevated intraocular pressure in patients with ocular hypertension or open-angle glaucoma

• Adult/adolescent/child/infant/neonate ≥1 wk: Ophthalmic
Instill 1 drop of a 2% solution into the affected eye(s) tid

Available forms:
Ophthalmic solution 2%

Administer:

• 
Wash hands before and after use, tilt the head back slightly and pull the lower eyelid down with the index finger to form a pouch, squeeze the prescribed number of drops into the pouch and gently close eyes for 1–2 min. Do not blink

• 
Care should be taken to avoid contamination, do not touch the tip of the dropper to the eye, fingertips, or other surface

• 
The sol may be used concomitantly with other topical ophthalmic drug products to lower IOP. If more than one topical ophthalmic drug is being used, administer ≥10 min apart

SIDE EFFECTS

CNS:
Headache

EENT:
Blurred vision, tearing, allergy, burning/stinging, photophobia

GI:
Bitter taste

PHARMACOKINETICS

Onset 1-2 hr, peak 3 hr, duration 8 hr, half-life 4 mo

INTERACTIONS

Increase:
effects—carbonic anhydrase inhibitors (PO), salicylates

NURSING CONSIDERATIONS
Assess:

• 
Hypersensitivity

• 
Monitor IOP during treatment

Evaluate:

• 
Decreasing IOP

Teach patient/family:

• 
How to use product

• 
Not to share with others or use for other conditions


 
To notify prescriber immediately if vision changes or if condition worsens

• 
To take as prescribed

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

doxapram (Rx)

(dox′a-pram)

Dopram

Func. class.:
Analeptic

ACTION:

Respiratory stimulation through activation of peripheral carotid
chemoreceptor; with higher doses, medullary respiratory centers are stimulated; with progressive CNS stimulation

USES:

Chronic obstructive pulmonary disease (COPD), postanesthesia respiratory depression, prevention of acute hypercapnia, product-induced CNS depression

Unlabeled uses:
Neonatal apnea

CONTRAINDICATIONS:

Hypersensitivity, seizure disorders, severe hypertension, severe bronchial asthma, severe dyspnea, severe cardiac disorders, flail chest, pneumothorax, PE, severe respiratory disease

Precautions:
Pregnancy (B), breast-feeding, children, bronchial asthma, pheochromocytoma, severe tachycardia, dysrhythmias, hypertension, hyperthyroidism

DOSAGE AND ROUTES
Calculator
Postanesthesia


Adult: IV
inj 0.5-1 mg/kg, not to exceed 1.5 mg/kg total as a single inj;
IV INF
250 mg in 250 ml sol, not to exceed 4 mg/kg; run at 1-3 mg/min

Drug-induced CNS depression


Adult: IV
Priming dose of 2 mg/kg, repeated in 5 min; repeat q1-2hr until patient awakes;
IV INF
priming dose 2 mg/kg at 1-3 mg/min, not to exceed 3 g/day

COPD (hypercapnia)

• 
Adult: IV INF
1-2 mg/min, not to exceed 3 mg/min for no longer than 2 hr

Available forms:
Inj 20 mg/ml

SIDE EFFECTS

CNS:
Seizures (clonus/generalized),
headache
, restlessness, dizziness, confusion, paresthesias, flushing, sweating, bilateral Babinski’s sign, rigidity, depression

CV:
Chest pain, hypertension, change in heart rate
, lowered T waves, tachycardia,
dysrhythmias

EENT:
Pupil dilation, sneezing

GI:
Nausea, vomiting, diarrhea, desire to defecate

GU:
Retention, incontinence, elevation of BUN, albuminuria

INTEG:
Pruritus, irritation at inj site

RESP:
Laryngospasm, bronchospasm,
rebound hypoventilation, dyspnea, cough, tachypnea, hiccups

PHARMACOKINETICS

IV:
Onset 20-40 sec, peak 1-2 min, duration 5-10 min, metabolized by liver, excreted by kidneys (metabolites), half-life 2.5-4 hr

INTERACTIONS


 
Synergistic pressor effect: MAOIs, sympathomimetics


 
Cardiac dysrhythmias: halothane, cyclopropane, enflurane; delay use of doxapram for at least 10 min after inhalation anesthetics

NURSING CONSIDERATIONS
Assess:

• 
BP, heart rate, deep tendon reflexes, ABGs, LOC before administration, q30min

• 
P
O
2
, P
CO
2
, O
2
saturation during treatment


 
Hypertension, dysrhythmias, tachycardia, dyspnea, skeletal muscle hyperactivity; may indicate overdosage; discontinue product

• 
Respiratory stimulation: increased rate, abnormal rhythm

• 
Extravasation; change IV site q48hr

• 
Patient closely for ½-1 hr

Administer:
IV route

• 
Undiluted or diluted with equal parts of sterile water for inj; may be diluted 250 mg/250 ml of D
5
W, D
10
W and run as inf; rapid inf may cause hemolysis

• 
IV undiluted over 5 min; IV inf at 1-3 mg/min; adjust for desired respiratory response, using inf pump IV; if an inf is
used after initial dose, start at 1-3 mg/min depending on patient response; D/C after 2 hr; wait 1-2 hr and repeat

• 
Only after adequate airway is established

• 
After O
2
, IV barbiturates, resuscitative equipment available

Syringe compatibilities:
Amikacin, bumetadine, chlorproMAZINE, cimetidine, CISplatin, cyclophosphamide, DOPamine, doxycycline, EPINEPHrine, hydrOXYzine, imipramine, isoniazid, lincomycin, methotrexate, netilmicin, phytonadione, pyridoxine, terbutaline, thiamine, tobramycin, vinCRIStine

Perform/provide:

• 
Placing patient in Sims’ position to prevent aspiration of vomitus

• 
Discontinue infusion if side effects occur; narrow margin of safety

Evaluate:

• 
Therapeutic response: increased breathing capacity

Teach patient/family:

• 
Purpose of medication

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

BOOK: Mosby's 2014 Nursing Drug Reference
3.67Mb size Format: txt, pdf, ePub
ads

Other books

Tempus Fugitive by Nicola Rhodes
The Burning Shore by Smith, Wilbur
Shy Town Girls by Katie Leimkuehler
Forbidden by Syrie James, Ryan M. James
Eyes Only by Fern Michaels