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55 Cards in this Set
- Front
- Back
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How does malnutrition affect drug efficacy?
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lowers oxidative metabolism & lowers GFR
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How does protein affect drug efficacy?
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Decreased amounts of protein --> more free drug
High fat meals and fasting --> more free drug |
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How do vitamins affect drug efficacy?
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can adversely affect action of some drugs
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How does food affect drug efficacy?
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May affect drug disposition, ie grapefruit juice
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Drug interactions with vitamins:
B1 |
antacids, caffeine, diuretics, estrogens, sulfa --> B1 deficiency
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Drug interactions with vitamins:
B2 |
Antidepressants, oral contraceptives --> B3 deficiancy
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sulfa drugs are suspected of inhibiting bacteria that form this vitamin.
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b7
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Drug interactions with vitamins:
Vitamin C |
Antacids, antdepressents, steriods
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Drug interactions with vitamins:
K |
Decrease anticoagulant effects of coumarin drugs.
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Echinacea
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short-term: stimulates immune function
Long-term: suppresses immune function |
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Garlic
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Lowers levels of of triglycerides, lowers ldl, and raises hdl. Lowers blood pressure.
Interactions: interferes with hypoglycemic therapy, potentiate antithrombotic effects of anti-inflammatory drugs. Increases bleeding time. |
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Ginger root
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Suppress N/V, can improve appetite
interactions: high doses can interfere with cardiac, antidiabetic, or anticoagulant therapies. |
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Ma Huang
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Decreases appetite, increases energy. Used to treat narcolepsy, bronchospasms, allergies, influenza, and colds.
Adverse effects: Arrythmiias, CVA, heart failure, HTN, seizure Drug interactions: increases CNS stimulation and adverse effects from caffeine, decongestants, CNS stimulants |
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What is an additive effect?
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1 + 1 = 2
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what is a synergistic effect?
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1 + 1 = 3 when the sum of the two drugs combined is more potent then when they are apart.
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What is Potentiation:
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1/2 + 1 = 2
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What is an Antagonistic interaction:
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1 + 1 = 0
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Dosages are based on?
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Weight
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Infants- birth - 12 months Route of administration:
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PO: bottle nipple, RX medibottle, infant drops
Rectal, IM: Vastus lateralis, smallest gauge needle IV: scalp, nondominant hand, forearm, upper arm feet, antecubital fossa |
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Toddlers:
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PO: can swallow liquid forms, or chew tablets.
Rectal IM: Vastus lateralis IV: scalp up to 18 months, then same as infant |
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Pre-schoolers 3-5 years
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IM injections: Vastus lateralis, Ventrogluteral, dorsogluteral, after walking for one year
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School aged 6-12
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PO some can swalow pills
same as pre school |
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adolescents
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Watch for sensitivity about their bodies. treat like an adult
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Older than 65
. gastric Ph means |
longer disintegration & absorption time, and decreased systemic drug
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Older than 65
Decreased blood flood means |
decrease in of absorption
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Name four pharmacokinetic distribution problems older adults might have:
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1. Decreased total body water
2. Decreased lean body mass 3. Increased body fat 4. Decreased serum albumin 5. Increased aphal 1-acid glycoprotein 6. less effective blood-brain barrier |
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What pharmacokinetic effects does happens to metabolism on adults older than 65
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decreased hepatic mass
decreased hepatic blood flow, thus increased drug blood levels, extended half lives, and you must account for smaller dosing as not to make toxic |
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What pharmacokinetic effects does happens to excretion on adults older than 65
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decreased renal blood flow
decreased glomerular function decreased tubular secretion= slower drug secretion and altered drug half-life |
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Name three core patient variables to take into consideration with people over 65
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1. do they live alone
2. mental status 3. Difficulty swallowing 4. lifestyle |
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Drugs compete with hormones of pregnancy thus...
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more free drugs in circulation, and more free drugs to cross the placenta
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What pharmacodynamic things happen during pregnancy having to deal with the circulatory system.
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there is 50% increase in cardiac output. Decreased arterial pressure.
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Which category is the safest a,b,c,d, or x?
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a
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What is category D
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Do not even think about it
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What is category X
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Remember Skull & Cross bones
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When is the best time for a pregnant women to take her meds?
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right before she breast feeds.
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Dextroamphetamine
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CNS stimulant system drugs, schedule 2 drug. ADD,ADHD
SE:Dizziness, agitation,, stimulation, tachycardia, palpiataions. |
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Caffeine
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(doxapram, Dopram)
Stimulates breathing. Relaxes bronchial smooth muscle. SE: Insomnia, increased pulse & blood pressure angina |
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Lidocaine
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Local anesthetic. Prolonged when you add epinephrine. Vasoconstriction.
SE: Hypersensitivity to amide local anesth., infection at site of administration. |
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Isoflurane (Forane)
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Inhalant, usually used in eye surgeries. Usually given with nitrous oxide.
SE: hypersensitivity to halogenated compounds, malignant hyperthermia. |
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Stages of anesthesia
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Stage 1: no pain
Stage 2: excitement, restlessness Stage 3: Surgical Anesthesia Stage 4: toxic stage |
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Balanced Anesthesia:
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Induction of anesthesia with a combination of drugs. Opiod, Barbiturates, benos, skeletal, neuro blocking agents, inhalants.
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lorazepam (Ativan)
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IV use for conscious sedation. effects gabba. BENZO
SE: Impairs the ability to store new information , glaucoma,, addiction drowsiness, blood disorders |
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Romazicon (Flumazenil)
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Antagonizes the efects of benzodiazapines. Used to reverse the effects of of benzos.
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Zolpidem (Ambien)
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Non-benzo Effects Omega-1 receptors, used only as a hypnotic.
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cyclobenzaprine (Flexeril)
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Muscle spasm (relaxants): cns depression.
SE: Anticholinergic activity is more prone in older adults (dry mouth, constipation) Arrhthmias |
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baclofen (Lioresal)
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Spasmolytics, centrally acting. A derivative of the neurotransmittier gabba.
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dantrolene (Dantrium)
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botulinum toxin type a (botox) Local acting . Fall risk, symptoms of hepatitis, blood dyscrasis
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phenytoin (Dilantin)
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Controls seizures by promoting sodium efflux.
SE: bradycardia,AV heartblock, softned gums, |
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carbamazepine (Tegretol)
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Used for complex partial seizures.
SE: Massive hepatic cellular necrosis, dizziness, drowsiness, nausea, vomiting |
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ethosuximide (Zarontin)
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used to control absence seizures. reduces synaptic nerve response to low frequency repetitive stimulation.
SE: GI effects, rash, pancytopenia, emotional, sleep disturbances. |
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clonazepam (Klonopin)
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Considered adjunct anticonvulsant.
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morphine (Roxanol)
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Narcotic agonist used to treat mild to moderate pain. Stimulates at the opiate receptors in the cns ( mu receptors)
SE: Respiratory depression, decreased urinary output, constipation, dizziness |
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codeine
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Moderate narcotic, often combined with nonsteroidal antiinflammatory drugs (nsaids).
SE: Drowsiness, dry mouth, constipation, nausea/vomiting |
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pentazocine (Talwin)
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Mixed agonist/antagonist narcotic. Stimulates at some receptors (kappa) but blocks at others (mu).
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Narcan
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Reversal of respiratory depression caused by narcotic overdose. Causes withdrawal in pt. who have opioid physical dependance.
SE: sweating, tachycardia, increased BP, tremors |