Mosby's 2014 Nursing Drug Reference (364 page)

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

saxagliptin (Rx)

(sax-a-glip′tin)

Onglyza

Func. class.:
Antidiabetic, oral

Chem. class.:
Dipeptidyl-peptidase-4 inhibitor (DPP-4 inhibitor)

Do not confuse:
saxagliptin
/sitaGLIPtin

ACTION:

Slows the inactivation of incretin hormones; improves glucose homeostasis, improves glucose-dependent insulin synthesis, lowers glucagon secretions, and slows gastric emptying time

USES:

In adults, type 2 diabetes mellitus as monotherapy or in combination with other antidiabetic agents

CONTRAINDICATIONS:

Hypersensitivity, diabetic ketoacidosis (DKA), type 1 diabetes

Precautions:
Pregnancy (B), geriatric patients, GI obstruction, surgery, thyroid/renal/hepatic disease, trauma

DOSAGE AND ROUTES
Calculator

• Adult:
PO
2.5-5 mg; may use with other antidiabetic agents other than insulin; if used with insulin, a lower dose is needed

Renal dose

• Adult:
PO
CCr ≤50 ml/min, 2.5 mg daily

Available forms:
Tabs 2.5, 5 mg

Administer:
PO route

• 
May be taken with/without food

SIDE EFFECTS

CNS:
Headache

ENDO:
Hypoglycemia (renal impairment)

GI:
Nausea, vomiting
, abdominal pain

INTEG:
Urticaria,
angioedema
, anaphylaxis

MISC:
Lymphopenia, peripheral edema

PHARMACOKINETICS

Rapidly absorbed, excreted by the kidneys (unchanged 24%), terminal half-life 2.5 hr, 3.1 hr metabolite, peak 2 hr, duration 24 hr

INTERACTIONS

Increase:
hypoglycemia—androgens, insulins, β-blockers, cimetidine, corticosteroids, salicylates, MAOIs, fibric acid derivatives, FLUoxetine, insulin, sulfonylureas, ACE inhibitors; CYP3A4/5 inhibitors

Drug/Herb

Increase:
antidiabetic effect—garlic, horse chestnut

Drug/Lab Test

Decrease:
lymphocytes, glucose

NURSING CONSIDERATIONS
Assess:

• 
Hypoglycemic reactions
(sweating, weakness, dizziness, anxiety, tremors, hunger); monitor blood glucose, HbA1c
renal studies:
BUN, creatinine during treatment

Perform/provide:

• 
Conversion from other antidiabetic agents; change may be made with gradual dosage change

• 
Storage in tight container at room temp

Evaluate:

• 
Therapeutic response: decrease in polyuria, polydipsia, polyphagia; clear sensorium; absence of dizziness; stable gait, blood glucose at normal level

Teach patient/family:

• 
To perform regular self-monitoring of blood glucose using blood-glucose meter

• 
About the symptoms of hypo/hyperglycemia, what to do about each

• 
That product must be continued on daily basis; about consequences of discontinuing product abruptly

• 
To avoid OTC medications, alcohol, digoxin, exenatide, insulins, nateglinide, repaglinide, and other products that lower blood glucose unless approved by prescriber

• 
That diabetes is lifelong; that this product is not a cure, only controls symptoms

• 
That all food included in diet plan must be eaten to prevent hypo/hyperglycemia

• 
To carry emergency ID

• 
To take product without regard to food

• 
To notify prescriber when surgery, trauma, stress, occurs because dose may need to be adjusted

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

scopolamine (Rx)

(skoe-pol′a-meen)

Maldemar, Scopace, Transderm Scop

Func. class.:
Cholinergic blocker

Chem. class.:
Belladonna alkaloid

ACTION:

Inhibits acetylcholine at receptor sites in autonomic nervous system, which controls secretions, free acids in stomach; blocks central muscarinic receptors, which decreases involuntary movements

USES:

Preoperatively to produce amnesia, sedation and to decrease secretions; motion sickness, parkinsonian symptoms

CONTRAINDICATIONS:

Hypersensitivity, closed-angle glaucoma, myasthenia gravis, GI/GU obstruction, hypersensitivity to belladonna, barbiturates

Precautions:
Pregnancy (C), breastfeeding, children, geriatric patients, prostatic hypertrophy, CHF, hypertension, dysrhythmia, gastric ulcer, renal/hepatic disease, hiatal hernia, GERD, ulcerative colitis, hyperthyroidism

DOSAGE AND ROUTES
Calculator
Motion sickness

• Adult:
TD
1 patch 4 hr before travel and q3days

Parkinsonian symptoms

• Adult:
PO
0.4-0.8 mg q8hr

Preoperatively

• Adult:
IM/IV/SUBCUT
0.32-0.65 mg;
TD
apply 1 patch
PM
before surgery or 1 hr before c-section

Nausea and vomiting

• Adult:
SUBCUT
0.6-1 mg

• Child:
SUBCUT
0.006 mg/kg; max 0.3 mg/dose

Available forms:
Inj 0.4 mg/ml; TD patch 72 hr (1.5 mg)

Administer:

• 
Parenteral dose with patient recumbent to prevent postural hypotension

• 
Parenteral dose slowly; keep patient in bed for ≥1 hr after dose

• 
With or after meals for GI upset; may give with fluids other than water

• 
At bedtime to avoid daytime drowsiness in patients with parkinsonism

• 
With analgesic to avoid behavioral changes when given preoperatively

Direct IV route

• 
Dilute with equal sterile water; give over 2-3 min

Syringe compatibilities:
Atropine, benzquinamide, butorphanol, chlorproMAZINE, cimetidine, diamorphine, dimenhyDRINATE, diphenhydrAMINE, droperidol, fentaNYL, glycopyrrolate, HYDROmorphone, hydrOXYzine, meperidine, metoclopramide, midazolam, morphine, nalbuphine, oxyCODONE, pentazocine, PENTobarbital, perphenazine, prochlorperazine, promazine, promethazine, ranitidine, SUFentanil, thiopental

Y-site compatibilities:
FentaNYL, heparin, hydrocortisone, HYDROmorphone, methadone, morphine, potassium chloride, propofol, SUFentanil, vit B/C

SIDE EFFECTS

CNS:
Confusion, anxiety, restlessness, irritability, delusions, hallucinations, headache, sedation, depression, incoherence, dizziness, excitement, delirium, flushing, weakness, fatigue, loss of memory

CV:
Palpitations, tachycardia, postural hypotension, paradoxical bradycardia

EENT:
Blurred vision, photophobia, dilated pupils, difficulty swallowing, mydriasis, cycloplegia

GI:
Dryness of mouth, constipation
, nausea, vomiting, abdominal distress,
paralytic ileus

GU:
Urinary hesitancy, retention

INTEG:
Urticaria, dry skin

MISC:
Suppression of breastfeeding, nasal congestion, decreased sweating

PHARMACOKINETICS

Excreted in urine, bile, feces (unchanged), half-life 8 hr

SUBCUT/IM:
Peak 30-60 min, duration 7 hr

IV:
Peak 10-15 min, duration 2 hr

INTERACTIONS

Increase:
anticholinergic effect—alcohol, opioids, antihistamines, phenothiazines, tricyclics

NURSING CONSIDERATIONS
Assess:

• 
VS periodically

• 
I&O ratio; retention commonly causes decreased urinary output

• 
Parkinsonism, EPS:
shuffling gait, muscle rigidity, involuntary movements; affect, mood, CNS depression, worsening of mental symptoms during early therapy

• 
Urinary hesitancy, retention; palpate bladder if retention occurs

• 
Constipation; increase fluids, bulk, exercise

• 
Tolerance during long-term therapy; dose may have to be increased or changed

Perform/provide:

• 
Storage at room temp in light-resistant container

• 
Hard candy, frequent drinks, sugarless gum to relieve dry mouth

Evaluate:

• 
Therapeutic response: decreased secretions

Teach patient/family:

• 
Not to discontinue product abruptly; to taper off over 1 wk

• 
To avoid driving, other hazardous activities because drowsiness may occur

• 
To avoid OTC medication: cough, cold preparations with alcohol, antihistamines unless directed by prescriber

• 
Transdermal route:
to apply with clean, dry hands; to wash, dry hands before and after applying to surface behind ear; to press patch firmly

• 
To avoid hazardous activities, activities requiring alertness because dizziness may occur

• 
To change patch q72hr

• 
To apply at least 4 hr before traveling

• 
If blurred vision, severe dizziness, drowsiness occurs, to discontinue use, use another type of antiemetic, or to rotate patch to other ear

• 
To read label of all OTC medications; if any scopolamine is found in product, avoid use

• 
To keep out of children’s reach

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