Mosby's 2014 Nursing Drug Reference (397 page)

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

tioconazole vaginal
antifungal

 

tiotropium (Rx)

(ty-oh′tro-pee-um)

Spiriva HandiHaler

Func. class.:
Anticholinergic, bronchodilator

Chem. class.:
Synthetic quaternary ammonium compound

Do not confuse:
Spiriva
/Inspra

ACTION:

Inhibits interaction of acetylcholine at receptor sites on the bronchial smooth muscle, thereby resulting in decreased cGMP and bronchodilation

USES:

COPD; for the long-term treatment and once-daily maintenance of bronchospasm associated with COPD, including chronic bronchitis and emphysema

CONTRAINDICATIONS:

Hypersensitivity to this product, atropine or its derivatives

Precautions:
Pregnancy (C), breastfeeding, children, geriatric patients, closed-angle glaucoma, prostatic hypertrophy, bladder neck obstruction, renal disease

DOSAGE AND ROUTES
Calculator

• Adult:
INH
content of 1 cap/day (18 mcg) using HandiHaler inhalation device

Available forms:
Powder for INH 18 mcg in blister packs containing 6 caps with inhaler; 30 caps with inhaler

Administer:
Inhalation route

• 
Caps are for INH only; do not swallow

• 
Immediately before administration, peel back foil until cap is visible and to “stop” line; remove cap from blister cavity; open dust cap of HandiHaler by pulling upward, then open mouthpiece; place cap in center chamber; firmly close mouthpiece until it clicks, leaving dust cap open

• 
When finished taking dose, remove used capsule and dispose of it; close mouthpiece and dust cap; store

• 
Rinse mouth after use

SIDE EFFECTS

CNS:
Depression, paresthesia

CV:
Chest pain, increased heart rate

EENT:
Dry mouth, blurred vision, glaucoma

GI:
Vomiting, abdominal pain, constipation, dyspepsia

GU:
Urinary difficulty, urinary retention, UTI

INTEG:
Rash,
angioedema

MISC:
Candidiasis, flulike syndrome, herpes zoster, infections, angina pectoris

MS:
Arthritis myalgic leg/skeletal pain

RESP:
Cough, sinusitis, upper respiratory tract infection
, epistaxis, pharyngitis

PHARMACOKINETICS

Half-life 5-6 days in animals, does not cross blood-brain barrier, very little metabolized in the liver, excreted in urine, 72% protein binding

INTERACTIONS

• 
Anticholinergics: avoid use with other anticholinergics

Drug/Lab Test

Increase:
cholesterol, glucose

NURSING CONSIDERATIONS
Assess:

• 
Respiratory status:
dyspnea, rate, breath sounds before and during treatment; pulmonary function tests at baseline and periodically; upper respiratory infections, cough, sinusitis

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

• 
Patient’s ability to use HandiHaler

Evaluate:

• 
Therapeutic response: ability to breathe easier

Teach patient/family:

• 
Signs of closed-angle glaucoma (eye pain, blurred vision, visual halos)

• 
That product is used for long-term maintenance, not for immediate relief of breathing problems; that effect takes 20 min, lasts 24 hr

• 
To avoid getting the powder in the eyes; may cause blurred vision and pupil dilation

• 
To hold HandiHaler with mouthpiece upward; to press button in once, completely, and release; this allows for medication to be released

• 
To breathe out completely; not to breathe into mouthpiece at any time

• 
To raise device to mouth and close lips tightly around mouthpiece

• 
With head upright, to breathe in slowly and deeply, but allow the cap to vibrate; to breathe until the lungs fill; to hold breath and remove mouthpiece; to resume normal breathing

• 
To rinse mouth after use; to use hard candy or regular oral hygiene to reduce dry mouth

• 
To report immediately blurred vision, eye pain, halos

• 
To keep caps in sealed blisters before use, store at room temperature

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

tipranavir (Rx)

(ti-pran′a-veer)

Aptivus

Func. class.:
Antiretroviral

Chem. class.:
Protease inhibitor

ACTION:

Inhibits human immunodeficiency virus (HIV) protease, thereby preventing the maturation of the virus

USES:

HIV in combination with other antiretrovirals

CONTRAINDICATIONS:

Hypersensitivity

 

Black Box Warning:

Hepatic disease (Child-Pugh B, C)

Precautions:
Pregnancy (C), breastfeeding, children, renal disease, history of renal stones, sulfa allergy, hemophilia, diabetes mellitus, pancreatitis, alcoholism, immune reconstitution syndrome, surgery, trauma, infection

 

Black Box Warning:

Intracranial bleeding, hepatitis

DOSAGE AND ROUTES
Calculator

Reduce dose with mild to moderate hepatic impairment and ketoconazole coadministration

• Adult:
PO
500 mg coadministered with ritonavir 200 mg bid with food

• Adolescent and child

2 yr:
PO
14 mg/kg given with ritonavir 6 mg/kg bid or 375 mg/m
2
given with ritonavir 150 mg/m
2
bid, max 500 mg with ritonavir 200 mg bid

Available forms:
Caps 250 mg; oral sol 100 mg/ml

Administer:

• 
Swallow cap whole; do not break, crush, chew

• 
After meals

• 
In equal intervals around the clock to maintain blood levels

• 
Give oral sol using calibrated dosing syringe or 5-ml oral syringe provided

SIDE EFFECTS

CNS:
Headache, insomnia
, dizziness, somnolence, fatigue,
fever
,
intracranial bleeding

GI:
Diarrhea, abdominal pain, nausea, vomiting
, anorexia, dry mouth,
hepatitis B or C, fatalities when given with ritonavir, pancreatitis

GU:
Nephrolithiasis

INTEG:
Rash
, urticaria, lipodystrophy,
serious rash

MS:
Pain

OTHER:
Asthenia,
insulin-resistant hyperglycemia,
hyperlipidemia
,
ketoacidosis

PHARMACOKINETICS

Terminal half-life 6 hr, peak 3 hr, plasma protein binding 99.9%, steady state 7-10 days, metabolism CYP3A4, 80% fecal excretion

INTERACTIONS

 
Life-threatening dysrhythmias:
amiodarone, astemizole, cisapride, ergots, flecainide, midazolam, pimozide, propafenone, quiNIDine, rifabutin, rifampin, terfenadine, triazolam

Increase:
myopathy, rhabdomyolysis
—HMG-CoA reductase inhibitors (lovastatin, simvastatin)

Increase:
tipranavir levels—ketoconazole, delavirdine, itraconazole

Increase:
levels of both products—clarithromycin, zidovudine

Increase:
levels of tipranavir—oral contraception

Decrease:
tipranavir levels—rifamycins, fluconazole, nevirapine, efavirenz

Drug/Herb

Decrease:
tipranavir levels—St. John’s wort; avoid concurrent use

Drug/Food

Decrease:
tipranavir absorption—grapefruit juice; high-fat, high-protein foods

Drug/Lab Test

Increase:
AST/ALT, cholesterol, blood glucose, amylase, lipase, triglycerides

NURSING CONSIDERATIONS
Assess:

• 
Signs of infection, anemia; presence of other sexually transmitted diseases

 

Black Box Warning:

Hepatic studies: ALT, AST; total bilirubin, amylase; all may be elevated, discontinue in those with hepatic insufficiency or hepatitis or AST/ALT 10 × upper limit or AST/ALT 5-10 × ULN and total bilirubin 2.5 × ULN

• 
HIV:
Viral load, CD4, plasma HIV RNA, serum cholesterol profile, serum triglycerides during treatment

• 
Bowel pattern before, during treatment; if severe abdominal pain with bleeding occurs, product should be discontinued; monitor hydration

• 
Serious rash:
if serious rash occurs, product should be discontinued

• 
Immune reconstitution syndrome: has been reported with combination antiretroviral therapy, patients may develop pain (MAC, CMV, PcP, TB) and autoimmune disease months after treatment

• 
Intracranial bleeding: more common in those with trauma, surgery, or those taking antiplatelets or anticoagulants

• 
Cushingoid symptoms: buffalo hump, facial/peripheral wasting, breast enlargement, central obesity

Perform/provide:

• 
Storage for caps in refrigerator before use; after opening, store at room temp; use within 60 days

• 
Storage for oral sol at room temp; use within 60 days after opening bottle

Evaluate:

• 
Therapeutic response: improving CD4 counts, viral load

Teach patient/family:

• 
To take as prescribed; if dose is missed, to take as soon as remembered up to 1 hr before next dose; not to double dose

• 
That product must be taken in equal intervals around the clock to maintain blood levels for duration of therapy

 
That hyperglycemia may occur; to watch for increased thirst, weight loss, hunger, dry, itchy skin; to notify prescriber

• 
That product does not cure AIDS, only controls symptoms; not to donate blood

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