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55 Cards in this Set

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