Final Flashcards
What is the tx for lead poisoning
EDTA
What are the sx for lead poisoning
headaches
Neurocognitive deficits
Kidney damage
Burtonian lines (gingiva)
Hg is used primarily in what form
MethylHg
Reacts with Selenium
What are the sx of Hg poisoning
gingivostomatitis
Neuronlogical
Psychiatric: Memory loss, depression, confusion
What is the tx for Hg poisoning
Cimercaprol: chronic us can cause renal toxicity
Succimer
How is arsenic absorbed
Respiratory
GI
Poor absorption through skin
What are the sx of arsenic poisoning
fatigue anemia renal failure Hyperpigmentation Hemolytic on RBC
What is the tx for acute arsenic intoxication
Decontamination
Unithiol (IV)
Dimercaprol (IM)
What is the tx for chronic arsenic intoxication
Folate dietary supplements
NO CHELATORS; irreversible damage has already occurred.
What is the tx for acute arsine intoxication
hemodialysis and transfusions
agressive hydration
NO CHELATORS; no benefit
How do chelators work
they render heavy metal ions unavailable for covalent interactions.
the longer the t1/2 of the heavy metal, the less effective is the chelator
When is dimercaprol used
for arsenic and Hg combined
It pulls Pb from bone and it goes to brain causing toxicity. contraindicated for lead poisoning alone.
Narrow therapeutic index.
Mostly has been replaced by succimer.
what is Succimer used for
Tx of
Pb, As and Hg poisoning.
water soluble; oral uses only, urinary excretion.
t1/2= 2-4 hrs
What is EDTA used for
Tx of Pb poisoning
chelates extracellular Pb only
IV,
100 by kidneys. Not for anuric pts.
What is Unithiol used for
Tx of Hg, As and Pb poisoning. Water soluble Oral or IV t1/2=20hrs NOT FDA APPROVED FOR ANY HEAVY METAL POISONINGS.
How does cyanide work
It is NOT a heavy metal
Prevents cells of the body from getting oxygen and ATP
What is the antidote for cyanide
Hydroxycobalamin
Pure Food and Drug Act
Addiction to opium and cocaine.
requires labeling and name ingredients.
patent medications.
Modified Food, Drug and Cosmetic act
Requires safety; caused by diethleneglycol tragedy
Drugs must be safe.
Durham Humphrey Amendment
Many new drugs needed to be regulated.
Rx vs OTC
Kefauver-Harris Amendment
phocomelia caused by thalidomide (morning sickness)
Required testing for safety and efficacy.
Dietary Supplement Health and Education Act
Due to little regulation regulates herbal products like food -Serving size -Structure function claims NOT INTENDED TO DIAGNOSE, TREAT, CURE, PREVENT ANY DISEASE.
Rx drugs
Addictive potential
Toxic, serious indications.
What agency controls animal testing
IACUC
What is phase I
Small group of healthy subjects
Safety, dose, administration and kinetics
What is Phase II
small group of subjects with conditions to be treated to test safety and efficacy.
What is phase III
extended clinical phase
large group of subjects
What is phase IV
Markenting.
See how product does in production.
IRB
Institutional Review Board
NDA
New drug application
IND
Investigational New Drug
Orphan drug act
For rare diseases to encourage drug development.
OTC decongestants
Vasoconstrictors, sympathomimetics
Oxymetazoline
Phenylephrine
Pseudophedrine (restricted sales)
-systemic: Increase BP and HR, longer acting
-Topical: short acting but more effective.
Antihistamines
Not effective for colds.
- dyphenhydramine (drowsiness)
- Cholpheniramine (Chlor-trimeton)
- Loratidine (claritin) (Less Drowsiness)
Antitussives
Codeine
Depenhydramine (Antihistamine)
Dextromethorphan (Robitussin)
Expectorants
Guaifenesin
Demulcents
Coat the throat to reduce irritation.
Antivirals
Oseltamivir (Tamiflu)
Zanamivir (Relenza)
Docosanol (Abreba)