Pharmacology ATI Test Info 4-08 Pharm. 2.0 (158066) [07S5371R70] Digoxin (lanoxin) [anti dysrhythmic]SE: blurred/double vision Guaifenesin SE: can cause drowsiness Estrogen (premarin) SE: ↑ risk of Thromboembolism with s/s: SOB, severe headache, vomiting, sudden acute pain in the calves, legs, chest, abdomen. Doxepin (Sinequan) [anticholinergic] SE: urinary retension, constipation, drying of nasal/oral secretons, ↑HR Albuterol (Proventil) [sympathomimetic/ adrenergic beta-2 agonist] Contraindicated: with MAOIs (can↑ action of albuterol and → HTN crisis); β-blockers can inhibit the therapeutic effects Use: invert canister, shake before use, rinse mouth after use, w/new inhaler perform test spray Levothryoxine (T4) Indication: hypothyroidism RT dysfxn of hypothalamus, pituitary, or thyroid gland Cephalosporins (Keflex)—allergy to cephalosporins is considered a precaution for taking penicillins Phenobarbital [Barbiturates]; interventions for anticonvulsant therapy: assess for resp. depression, excess sedation from toxic effects, IV at < 50mg/min, avoid extravasation (alkaline→skin damage) Sumatriptan (Imitrex): Use: when migraine symptoms appear and again in 1 hr if symptoms persist Route—fastest/most effective: intravenous Narcan [opioid antagonist]: therapeutic action: improvement of respiratory rate. Baclofen (Lioresal) Therapeutic action: ↓ frequency & severity of muscle spasms Erythromycin (Erythrocin) [macrolide] SE: liver toxicity Insulin: high dose (U-500) is 5 times stronger than U-100—divide dosage ordered by 5 Spironolactone (Aldactone) [K sparing diuretic]—avoid foods w/ ↑ K such as salt substitutes Chloroquine phosphate (Aralen): Indic.: malaria prevention; Use: take weekly starting 1 week before departure and continued for 4 weeks after return. Heparin (anticoagulant) Use: w/alteplase for acute MI Warfarin (Coumadin) Use:long-term prophylaxis of thrombosis [antidote—Vit K] Clopidogrel (Plavix) Use: reduce long-term risk of clotting w/ atherosclerosis and recent MI of CVA Alteplase (Activase) [antithrombolytic] Use: Acute MI/CVA (has short half-life) Methylphenidate (Concerta) Use: marcolepsy Precaution: avoid caffeine use Testosterone IM—If use to correct delayed puberty→assess bone maturation with bi-annual x-rays of hand and wrist; monitor liver fxn (can ↑ hypoglycemia, potentiate sleep apnea, exacerbate heart failure due to fluid retension. Diphenoxylate & Atropine (Lomotil) Caution: With Renal impairment ↓ elimination of atropine → ↑ anticholinergic effects of atropine like confusion Loperamide (Imodium) Use: anti-diarrheal (poorly absorbed from GI tract; difficulty crossing the bloodbrain barrier) Methylcellulose (Citrucel): bulk-forming agent with minimal Side Effects (SE) Psyllium (Metamucil): bulk-forming agent with minimal Side Effects (SE) Acetazolamide (Diamox) [diuretic] Indic.: edema, epilepsy, acute mountain sickness, glaucoma (↓ intraocular pressure by ↓ amount of aqueous humor in the eye) Contra: allergy to sulfonamides Metoprolol (Lopressor) [β-blocker] Hold dose for dyspnea (sign of exacerbation of CHF) Propanolol (Inderal) Use. Dysrhythmia, HTN, angina; SE: bronchoconstriction/bronchospasm; can block glyconeogenesis Norgestrel (Ovrette) Use: contraception; SE: excess progestin →weight gain from ↑ appetite; deficiency of progestin: late breakthrough bleeding, amenorrhea; excess estrogen → edema Medroxyprogesterone (Provera); Contra: smoking/tobacco products; Risks: Thromboembolism & Cardiovascular complications; Interventions: use additional contraceptive measures w/antibiotic therapy IM injection site: locate dorsogluteal site Nausea tx: antiemetic plus cool, damp cloth to forehead, neck, and wrists. Allopurinol (Zyloprim) Ind. Gout; MofA: ↓ serum uric acid levels & urinary uric acid secretion; Precaution: avoid foods that acidify urine such as corn TB—multi drug tx: Isoniazid(INH), Rifampin, pyrazinamide, ethambutol—to deal w/ resistant strains ACE Inhib. Lisinopril (Zestril) SE: dry/persistent cough for 1-2 wks from ↑ bradykinin Synergistic drugs: Effect of giving both drugs > than the drugs individually Furosemide (Lasix) [loop diuretic] Intervention: check BP before giving to determine baseline; can cause ↓ BP by ↓ circulatory volume or by relaxing venous smooth muscle Ticlopidine (Ticlid) Indic: prevent coronary artery thombosis; Intervention: check platelet count PRBC (packed red blood cells) used as blood replacement when fluid overload is a concern IV medications: Intervention: assess site for redness/swelling before administration Collagenase (Santy) Use: Debride ulcers Interferon Use: Prevent viral replication Isotretinoin (Accutane) Contra: pregnancy w/ 2 forms of birth control due to teratogenic effects Vaccine—adv. of live vs attenuated/killed vaccine: long-lasting active immunity vs partial (passive) Epoetin Alfa (Procrit) Indic: treat anemia; SE: headache, HTN, seizures RT Hct rises too quickly Urofollitropin (Fertinex) Dosage: admin. IM based on dose in preceding cycles SE: ovarian hyperstimulation syndrome. Hypertensive crisis S/S: flushed skin, headache, visual changes Acetylcysteine (Mucomyst) Indic: prevent liver damage following acetaminophen (Tylenol) overdose. Most effective if given shortly after ingestion; some protection up to 24 hrs. Montelukast (Singulair) Indic: prevent asthma exacerbations;Dose: daily at bedtime; SE: well tolerated Metoclopramide (Reglan)—has increased sedation when given with Morphine Mannitol—Caution with pts with heart disease (can precipitate CHF and pulmonary ededa) Opiate overdose causes Respiratory depression. Narcan antidote shorter acting. May need > 1 dose. Diphenhydramine (Benadryl) Precaution: avoid other CNS depressants such as: alcohol, benzodiazepines, kava kava Anaphylaxis rxn—S/S: bronchoconstriction, angioedema, hypotension Mafenide acetate (sulfamylon) Interventions: Admin PRN analgesics 30 min prior to tx; apply after daily tubbing to remove previous cream; Monitor fluid & electrolyte/acid-base balances; schedule wound care > 1 hr before meals; wear sterile gloves when applying Zidovudine (AZT)—Dose: take at the times prescribed to prevent resistance development SE: bone marrow suppression, hepatotoxic, nephrotoxic Thrombocytopenia (< 150,000) Assess: platelet count Prothrombin time:Indic:evaluate adequacy of extrinsic system&common pathway in clotting mechanism Sulfisoxazole (Gantrisin): Use: UTI Cyclosporine (Neoral): Intervention: Mix w/ orange juice or milk to ↑ palatability; mixed & dispense in a glass container(since drug binds to plastic); grapefruit juice ↑ cyclosporine levels & ↑ risk of toxicity; administer immediately after mixing (can separate & settle) Hexacholorphene (pHisoHex) [antiseptic solution] Caution: CNS stimulation if sufficient amts are absorbed through skin or mucous membranes; avoid if pregnant/breastfeeding Auranofin (Ridaura) [gold salt] Indic: slows the progression of rheumatoid arthritis; takes 4-6 months of therapy to achieve therapeutic effect; SE: renal toxicity (less toxic through oral route than IM route), severe blood dyscrasias, GI rxns, Thiazides—SE: hyperuricemia (common SE); assess: uric acid levels Simvastatin (Zocor)—SE: muscle weakness/aches; Assess: Creatine Kinase (released w/severe muscle injury) Amitriptyline (Elavil) [tricyclic antidepressant] SE: orthostatic hypotension, sedation, & confusion Pharm. 1.0 (158065) [07S5381R69] Drug dosage error—all care providers involved are responsible Narcotic (opiate) analgesic—SE: papillary constriction, ↓BP, ↓HR, ↓ GI mobility Antihistamines—Indic: allergy-induced symptoms Mucolytic—Indic: ↓ viscosity of mucus plugs making them easier to expel Antitussive—Indic: used to suppress a cough Decongestant—Indic: used to treat nasal congestion Bulk-forming laxatives (Metamucil) Use: take w/lg amounts of water to prevent a gel-like mass to ↑ constipation Gentamicin (Garamycin) [aminoglycoside antibiotic]; SE: nephrotoxicity & ototoxicity Digoxin [cardiac glycoside] that ↓ HR. Interv: assess apical HR for 1 min. Contact DR if HR < 60bpm Lorazepam (ativan) [benzodiazepine]: SE: adbrupt cessation can →seizures RT physical addiction Dantrolene sodium (Dantrium)—SE: hepatitis (highest risk for women 35yrs or taking lg doses) Synergistic effect—effect of combined drugs greater than either of drugs alone Zidovudine (AZT)—only anti-retroviral drug that reduces maternal-fetal transmission of HIV virus Didanosine (Videx)— Nevirapine (Viramune)— Saquinavir (Fortovase)— Acetaminophen (Tylenol)—SE: Liver damage w/ high doses Diuretic therapy—Assess: K+ values to prevent dysrhythmias; ↓ Na+, ↓ Cl-, & ↓ Mg 2+ Gold Salts—bind to erythrocytes; SE: fatal bone marrow suppression, leucopenia, thrombocytopenia, anemia; assess: Lab-CBC Psuedoephedrine (Sudafed) [sympathomimetic/decongestant]—increases BP, HR, RR; Contraindication: HTN Sustained-release medication—Use: do not open, crush, or chew the medication K+--necessary for: nerve & muscle cells (esp. those in the heart), impulse transmission Anticonvulsant drugs—MofA: increase seizure threshold Asthma therapy—Use: use albuterol (sympathomimetic drug) first to open up airways and allow other inhaled drugs to be dispersed further down the bronchial tree Ipratropium bromide (atrovent) Beclomethasone dipropionate (Beclovent) Greatest absorption of drug by IV route Acyclovir (Zovirax)—SE: nephrotoxicity (crystallization of drug in nephron→renal tubular obstruction) Digoxin toxicity—can be from ↓K+ (hypokalemia) Fluoxetine (Prozac) [SSRI]—Teach: effects may not be seen for weeks; Dosage starts at 20mg, can be increased after 2 wks gradually up to 80mg/day divided into 2 doses Succinylcholine [depolarizing NMBA] common SE: muscular pain/stiffness HCTZ (HydroDIURIL) [thiazide diuretic]—SE: may induce hyperglycemia (diabetics need to ↑ insulin) Hypoglycemics—MofA: increase insuling produced by pancreas; Contra: ineffective w/Type 1 DM RT inadequate production of insulin by pancreas Vecuronium (Norcuron) [nondepolarizing NMBA]—MofA: causes relaxation of muscles & total flaccid paralysis, but does not affect CNS, diminish pain, or consciousness Insulin duration (Regular-6-8hrs); Onset ½ - 1hr; peaks 2-4hrs Tolerance—body develops natural resistance to drug effects, need to increase dosage Addiction—physical or psychological need for a drug Substance abuse—inappropriate, excessive, self-admin of drug for non-medical purposes Tissue dependence---occurs when actual changes in cells, secondary to physical addition causes body to need the drug for homeostasis Metabolism of 95% of all drugs occurs in the liver. Other sites—lungs, skin; kidney excretes most drugs Acetylcysteine (Mucomyst)—used in treatment of Acetaminophen (Tylenol) overdose MAOI—interactions: foods w/ tyramine (causes release of NE→ hypertensive episode) Antidysrhythmic agents—alter the dysfunction in the electrical system of the heart. Prednisone (Deltasone) [corticosteroid] suppresses endogenous cortisol production, so abrupt stopping of drug can result in acute adrenal insufficiency can occur FDA pregnancy categories: A—human studies safe; B- animal studies safe, but no human studies have been done; C- Animal studies unsafe, no human studies, D- evidence of fetal risk, X-cause abnormalities Tamoxifen citrate (Nolvadex)—type of hormonal antineoplastic agent: anti-estrogen Aluminum hydroxide (amphojel)—long term use SE: constipation (antiacids w/Mg alone cause diarrhea; Often Al & Mg are combined to balance their side effects) Corticosteroids—can interfere with effect of a vaccine since they depress the immune system and can interfere with body’s ability to produce antibodies Furosemide (lasix)—used for treatment of HTN in clients with renal dysfunction Mannitol (Osmitrol) is an osmotic diuretic and is not used in the treatment of HTN Triaterene/hydrochlorthiazide (maxzide)—a thiazide diuretic that is ineffective when ureine output is low or renal dysfnx is present Levothyroxine (synthroid)—overdose s/s: those that mimic hyperthyroidism: tremor & wt loss ; undermedicated s/s: cold,dry,scaly skin; depression; slow cognitive ability Liver & kidney disease—causes increase in length of duration of action of medication Auditory canal in children—straighten by holding pinna of ear down & back H. pylori—4 medications needed to eradicate the pathogen & ↓ risk of recurrence of ulcer (2 different antibiotics; bismuth; medication to ↓ gastric acidity in the stomach) Dopamine (Intropin)—Dose for cardiac shock: Intermediate doses ↑ CO; other uses: low doses ↑ renal perfusion & urine output; high doses (>10mcg/kg/min) α effects predominate→vasoconstriction & ↑BP Parkinson’s—associated with ↓ of dopamine in the substantia nigra (brain) Terbutaline (Brethine)—SE: tachycardia Gout treatment: drugs that lower uric acid level in the blood→ ↓ doposition of urate crystals in joints Dexamethasone (Decadron)—effects on blood glucose: glucocortoid steroids & stress ↑ blood glucose Narcotics—MofA: alter perception of pain at the spinal cord & higher levels in the CNS Diuretics—pt. education: take during the day, report any changes in daily wt. Oral Iron supplement—adverse SE: gastric irritation→anorexia, nausea, vomiting, constipation Amphotericin B (Fungione)—SE: ↓K; ↓Mg; ↓Cl; ↓ Ca; nephrotoxicity (80% of pts) Anti-hypertensive medications—SE: orthostatic hypotension Trimethoprim/Sulfamethoxazole (Bactrim)[sulfonamide antibiotic]—SE: crystalluria that can clog the kidneys; to prevent ↑ fluids to 2-3 liters per day unless contraindicated Triazolam (Halcion)[benzo]—use: do not take with alcohol Theophylline—therapeutic serum level: 10-20mcg/mL Drug distribution via IV altered with CHF Diphenhydramine (Benadryl)—SE: drowsiness Treatment for constipation in children—glycerine suppositories (↑ osmotic pressure-draws fluid into colon) castor oil-distasteful & ↓ absorption of fat-soluble vitamins; Intradermal route used to admin: tuberculin test (PPD) Cromolyn sodium (Intal)—indication: asthma prophylaxis (mast cell stabilizer→↓ release of histamine, bradykinin, and serotonin that start a cascade of aqllergy symptoms) IM site for 18 month old child: vastus lateralis Metronidazole (Flagyl)—education: avoid alcohol (drug inhibits alcohol metabolism→accumulation) Fluticasone (Flovent)[inhaled steroid]—Indic.: decrease inflammation of the bronchi Status epilepticus: tx given via IV route Fexofenadine [2nd generation antihistamine]: differs from 1st generation by ↓ sedation Neostigmine (Prostigmin)—MofA in pt w/ myasthenia gravis: ↑ level of Ach at neuromuscular junction increases strength of muscle contraction Calcium therapy need adequate amts of : vit. C Naloxone (Narcan): narcotic antagonist Barbiturate overdose RT: respiratory depression Penicillin allergy may ↑ risk for allergy to : cephalosporins Transdermal patch—education: rotate the site each time you change the patch Proton pump inhibitors for treatment of: GERD Acetaminophen Tylenol: safe for children with flu-like symptoms Ibuprofen (Motrin)—Most common SE: GI distress Maximum IM injection into dorsogluteal site: 3 mL Phenobarbital (Luminal)—assess: respiratory depression Insulin—oral hypoglycemic agents are contraindicated during pregnancy—use insulin instead Drug absorption—affected by route of administration Eye drop administration: depress the lower lid and place the medication in the lower conjunctival sac. Pain medication admin in terminally ill: give medication on a regular time interval rather than PRN Ventricula dysrhythmias in emergency setting—drug of choice: lidocaine hydrochloride (Xylocaine) Diltizem (Cardizem)—used for SVT Tocainide HCl (Tonocard)—used to prevent ventricular arrhythmias Propranolol (Inderal)—used to prevent/control SVT (esp. assoc. w/ excessive catecholamines) Unconscious type 1 diabetic—best intervention: admin glucagons IM Anti-convulsant for infants/children: Phenobarbital (often admin w/ phenytoin) Types of immunity: passive—immune: globulins/serums; active: illness or vaccination; innate: present at birth; artificial-active: conveyed from one person to another (meternal-fetal transmission) Bipolar—drug of choice: lithium Tricyclic drugs—used in treatment of depression MAOI drugs—used in treatment of depression Benztropine mesylate—used to treat extrapyramidal effects w/ use of phenothiazines Nasal congestion—treat with decongestant Anti-tussive—treat cough Mucolytic—used to decrease the viscosity of mucus plugs making them easier to expel Antibiotics—SE: ↑ risk for fungal infection (destroys good bacteria & allows overgrowth of fungus) Niacin—SE: vasodilation & facial flushing Atropine—use: severe symptomatic bradycardia Verapamil (Calan)—use: ↓ HR Phenytoin (Dilantin)—therapeutic level: 10-20 mcg/mL Decreased biotransformation of drugs in children→slowing the metabolism of many drugs (biotransformation = metabolism) Insulin—peak: NPH—6-12 hrs Penicillin—most common SE: nausea/vomiting/diarrhea Sympathomimetics: mimic SNS → ↑ BP Beta-adrenergic blockers: block SNS →↓BP, ↓HR, ↓ arterial pressure, ↓ CO Muscarinic antagonist AKA anticholinergic agents: block PSNS→ SNS responses Diphenoxylate HCl (Lomotil)—SE: dry mouth (from added atroprine to discourage abuse)