Lecture 4 (Special Populations)-Exam 2 Flashcards
Vitamin C deficiency
* What is the active form?
* What is the MCC?
- Active form: Ascorbic acid
- MCC: decreased intake
Vitamin C deficiency
* What are the manifestations?(5)
- Periodontal disease
- Impaired immune system
- Impaired wound healing
- Depression
- Microcytic anemia
What is the treatment for vitamin C deficiency?
- Increased intake
- Ascorbic acid: 70 to 150 mg IM/IV/SC daily
Appendicitis treatment: not ruptured
* What is first line?
* What do you need to do perioperativly? Post operative?
First-line: appendectomy
* Perioperative antibiotics: Ceftriaxone plus metronidazole
* 0 to 7 days post operative antibiotics-> Less evidence
Appendicitis treatment: ruptured or sepsis
* What is first line?
First-line: supportive care plus antibiotics
* Stabilize
* Percutaneous drain
* Antibiotic therapy
Rupture / sepsis:
* What are the empiric IV antibiotics choices? (3)
* What can be added?
- Meropenem or imipenem
- Piperacillin/tazobactam
- Ciprofloxacin plus metronidazole
- ± percutaneous drain
Appendicitis treatment:
* When do you convert the antibiotics?
* When do you f/u?
- Conversion to oral antibiotics once clinically improved to complete 7 to 10 days course
- Follow-up in 6 to 8 weeks for scheduled appendectomy
What are the challenges to safe and effective drug therapy in the elderly? (5)
- Polypharmacy
- Altered pharmacokinetics / pharmacodynamics
- Physiologic reserve
- Access to medications
- Social system and support
Polypharmacy
* WHO defines this as what?
* What are the risk factors?(6)
World Health Organization (WHO) ≥ 5 drugs at any one time
* Aging population
* Complex therapies
* Multiple prescribers
* Multiple pharmacies
* Psychosocial issues
* Adverse drug reactions (prescribing cascade)
Strategies to Prevent Polypharmacy
* Maintain what?
* Encourage patients to do what?
* Review what?
* Use the fewest what?
- Maintain an accurate medication list and medical history and update whenever possible
- Encourage patients to bring all medications including prescription, OTC drugs, supplements, and herbal preparations
- Review any changes with patient and caregiver and if possible, provide all the changes in writing
- Use the fewest possible number of medications and the simplest possible dosing regimen
Strategies to Prevent Polypharmacy
* Try to link what?
* Discontinue what?
* Screen for what?
* Use for type of approach?
* Avoid what?
- Try to link each prescribed medication with its diagnosis
- Discontinue all unnecessary medications
- Screen for drug-drug and drug-disease interactions
- Use a team approach if possible involving the caregiver or family and pharmacist
- Avoid starting potentially harmful medications; use Beer’s criteria
Strategies to Prevent Polypharmacy
* Try to start medications how?
* Avoid starting medications to combat what?
* What should you be doing during transitions of care?
* Consider what when assessing emdication appropriatenees?
- Try to start a new medication at the lowest dose and then titrate slowly
- Avoid starting medications to combat the potential side effects of other medications (prescribing cascade)
- Careful medication reconciliation during transitions of care
- Consider goals of care and life-expectancy of patients when assessing medication appropriateness
Pharmacokinetic / Pharmacodynamic changes
* Increase risk of what?
* Physiologic changes alter what?
* Increased sensitivity to what? Give examples (4)
Increased risk of adverse drug reactions due to pharmacokinetic changes
Physiologic changes alter response to drug therapy
Increased sensitivity to adverse drug reactions
* Antihypertensives
* Anticoagulants
* Anticholinergic
* CNS drugs
Pharmacokinetic / Pharmacodynamic changes
Common criteria for risk determination
* What does the drug burden index incorporate?
* Increasing number of these medications lead to what? (3)
Incorporates drugs with anticholinergic and CNS adverse effects
Increasing number of these medications leads to
* Impaired mobility
* Decrease in cognitive testing
* Increased falls
Common criteria for risk determination: Drug burden index
* Total number of medications did not increase what?
Total number of medications did not increase adverse effects if these two medication classes excluded(anticholinergics and CNS)
Common criteria for risk determination: beers criteria
* What is it?
* What does look at? (5)
List of medications potentially inappropriate for older patients due to risk of adverse effects
* Potentially inappropriate in most groups
* Typically avoided based on specific conditions (ex. Liver disease)
* Used with caution
* Drug-drug interactions
* Dose adjust based on kidney function
What are the medications commonly associated with ADRs in elderly?
- Anticoagulants
- CNS agents
- Antipsychotics
- Opioids
- Benzodiazepines
- Antidepressants
- Sedative hypnotics
- Antiepileptics
- Diuretics
- Antihypertensives
What is the step wise approach to reviewing medications for older adults?
Under prescribing
* What is it?
* Why does this happen? (5)
Number of medications / medication doses below guideline recommended normal
* Prescribers not aware of continued benefits in older adults->Treatment and prophylaxis (old studies vs new)
* Informed under prescribing (scared of overdoing it)
* Increase compliance
* Limit drug interactions
* Maintain QOL
Access affordability
* What are the issues? (2)
- Underinsured or uninsured – specifically medications
- Compliance decreases with lack of insurance coverage
Access affordability
* What are the ways to help? (4)
- Know your patient’s situation
- Know least expensive drugs in major classes used
- Have a person who can tap them into resources
- Watch out for the new, “fancy” medications
Antifungal example
* What is an example of expensive drug?
* What is the dosing?
* What is the problem?
Preventable causes of drug- related problems
Preventable causes of drug- related problems
Pediatric drug therapy
* How many drugs have been approved for pediatric patients?
* Majority of drugs are what?
* Rarely what occurs? (give two examples)
25 to 30% of FDA approved drugs have specific indications for pediatric patients
Majority of marketed drugs are used to some extent in this population - off label
Rarely, drugs are approved specifically for the treatment of patients 1 to 21 years
* Rasburicase (Elitek)-> Increase uric acid secretion
* Clofarabine -> AML in children
Pediatric drug therapy
* What has the FDA created?
* What are the two acts what were passed?
The FDA has created incentives for pediatric research
* 2003 pediatric research equity act: six-month extension of patent rights to the drug for pediatric research
* 2007 best pharmaceuticals for children act: drug companies need to give detail regarding why a drug is not suitable for use in the pediatric population if they decline to do ped trials and must also describe why a pediatric formulation is not possible if pediatric indications is being sought
Pediatric drug therapy: AAP off label
* Definition: Use of drug not included in what? Does not imply what? (2)
Definition
* Use of drug not included in the prescribing information
* Does NOT imply improper, illegal, contraindicated, or investigational use
* Does NOT imply therapy unsupported by evidence
Pediatric drug therapy
* What is not required?
Consent NOT required for non-experimental use
What is gestational age, postnatal and postmenstral age?
Pharmacokinetics-children
* What is the absorption difference?
* What are the different components?(4)
- No clinically significant difference
- GI motility, gastric pH, skin integrity, intramuscular volumes
Pharmacokinetics: Peds
* What is different about distribution? (3)
- Increased total body water (lose over time)
- Increased total body fat (increase over time)
- Ineffective albumin (decrease albumin and effective)
Pharmacokinetics: Peds
* What is different about metabolism?
- Preterm – decreased metabolic activity of liver
- Term to 1 year – mild decrease in metabolic activity of liver
- 1 to 10 – increased metabolism of liver (Works very well because the liver is not damage)
CYP enzymes mature @ different times
Pharmacokinetics: peds
* What is different about excretion?
Preterm – decreased GFR (creatinine clearance)-> Vs. term babies (still not as well)
Medication dosing- Peds
* Be caution about what?
* Max dose is generally what?
* Write dose in what?
* Watch out for what?
- Mg/kg dosing – use caution with mg/kg/day vs mg/kg/dose
- Maximum dose is generally max adult dose
- Write dose in mg in order to prevent errors
- Watch for accidental weight in pounds instead of kg
Medication dosing- Peds
* Get comfortable with what?
* What is not recommended?
* Never tell a child what?
* What should be use?
- Get comfortable with appropriate volumes per age
- Mixing with food generally not recommended
- Never tell a child the medication is candy
- Syringes or measuring spoons should be use (do not use home spoon)
What is the ideal pediatric drug? (5)
- Very tasty liquid, chewable, dissolvable tablet
- Low volume
- Low frequency
- Easy storage
- Easy to administer
Prescribing and administration barriers
Prescribing and administration barriers: Taste
* What should you know?
* Avoid doing what?
* Try what?
* What are some examples?
* Professional what?
* Work on what?
- Knowing medications that taste poorly
- Avoid mixing with food
- Try foods before or after
- Popsicles, chocolate sauces, peanut butter
- Professional flavoring
- Work on pill swallowing
Poison prevention
* What are the different laws passed over the years (3)
- 1953 - 1st US Poison Center
- 1970 – Poison Prevention Act
- 2002 – Introduction of toll-free Poison Help Line (800)-222-1222
Poison prevention:
* How many centers across the US?
* When are the open?
* Who are the people placing the phone calls?
* who are 50% of reported calls about?
- 55 centers across the United States
- 7d/24h/365d
- 70% of calls are from caregivers in the home
- 16% of calls are healthcare providers
- Children < 6 years = 50% of poisons reported
Poison prevention
* Pattern of poisoning varies by what? Expand
Pattern of poisoning varies by age
* < 6 years = unintentional
* Adolescents and young adults = mostly intentional (62%)