Midterm 1 Flashcards
How many drug arrests are there in a year?
1.9 million
How many drug arrests are there for violent crime?
600,000
How many arrests are there for property crime?
1.5 million
T or F: US has the highest per capita incarcerations in the world
T
Trend in marijuana arrests per year
increasing from 1966 to 2011
What percentage of marijuana arrests per year were for possession?
90%
Around which length of time did the funds for UC/CSU shift to corrections ( imprisonment)?
1997-1998
What are the current amounts for funding for corrections and UC/CSU respectively?
$8.1 million ( corrections)and $4.9 billion (UC/CSU) as of 2009-2010
What is a drug?
a chemical which in relatively small amounts has effects on physiology ( functioning of the organism)
Psychoactive drug
a chemical that has effects on human behavior ( thoughts, feelings, actions) via its effects on the nervous system; that affects the psyche= mind ( thoughts, feelings, perceptions, consciousness)
pharmocology
the study of how drugs interact with the body ( includes absorption, distribution, mechanisms of action, metabolism, elimination)
psychopharmacology
the study of how psychoactive drugs interact with the body and mind
medicine
substance used for treating disease; or that has beneficial effects on a state of health
poison
a dangerous or deadly substance
pharmaco, from Greek word “pharmako”
medicine and poison
botany
study of plants
ethnobotany
study of relationships between plants and the people who have come to know them
ethnopharmacology
study of chemicals (drugs) that come from plants used by indigenous peoples
herbalists
plant experts who used their knowledge of plants to heal
list some of the healers who may draw some of their powers from plants
- shaman ( central asia)
- Curander, Curandera, Vegalista ( Latin America)
- witch doctor, medicine man/woman, sorcerer, wizard, magician
allies
one who helps,plants can help people do things
What message about plants do we get from Adam/ Eve’s fall from Garden of Eden?
plants that give knowledge are dangerous and forbidden and if consumed lead to severe punishments
Who is Hildegarde von Bingen and what did he do?
a nun that collected and recorded properties of plants in medicine
What happened during the inquisition ( 1200-1600)?
anyone who was related to power plants were labeled as witches and were tortured and executed. This was propelled by the Catholic Church
What is the Malleus Malleficarum (1486)?
a book that means Hammer of Witches.
Explains how to find and kill witches.
Blessed by Pope Innocent VIII
Paracelsus (1493-1541)
father of the modern science of pharmacology
“if infection is prevented, Nature will heal the wound”
“A man who is angry is not angry in his head of first but all organs of the body”
“all substances are poisons; there is none which is not a poison. The difference between a poison and a remedy depends on the dose”
main point: everything is a poison, only the dose varies
more on Paracelsus (1493-1541)
Theophrastus Phililppus Arueolus Bombastus von Hohenheim
physician, scientist, chemist, alchemist, philosopher,
chemical urinalysis
administration of specific medicines, pharmacology
proposed better methods for treating wounds and preventing infection
called for the humane treatment of the mentally ill
appreciated the connection between mental states and physical properties of the body
“All substances are poisons; there is none that is not a poison. The right dose differentiates a poison and a remedy”
power plants
plants as teachers: plants have the power to heal and teach
droog
old fashioned word for dried plant
What are the different routes of drug entry into the body?
- oral/digestive
- inhalation
- injection (IV, IM, IP, subQ)
- intranasal/ insufflation/snorting
- rectal
- transdermal
What is the order of blood flow?
heart, arteries, capillaries, veins, heart
how many liters of blood do we have?
5 L
how long does it take for the blood to make it to the whole body?
1 min
T or F: chemicals in blood distribute throughout entire blood supply
T
T or F: chemicals Do NOT partition into body tissue to varying degrees
F
What is job of the liver?
biotransformation/ metabolism
makes foreign chemicals more water soluble to promote excretion
Define biotransformation
chemical change of the structure of a substance
alternation of a substance, like a drug, within the body
what are the enzymes involved in biotransformation/ metabolism?
cytochrome P450 and other enzymes
Explain the oral/ digestive route of entry (administration)
ingestion by the mouth
enters the stomach and intestines
hepatic portal system from gastrointestinal system to liver
first-pass metabolism= possible biotransformation by the liver
time to brain approx 20 min
what is the approx time of a drug entry to the brain via the oral/digestive system?
20 min
hepatic portal system
capillaries from stomach and intestines send blood to liver
vessels that carry blood from stomach and intestines to the liver
first pass metabolism
substances go through the liver first and change chemically before entering the blood
biotransformation by the liver
occurs in the liver
results in a biotransformation
what do all other routes of entry other than the digestive system have in common?
They bypass the digestive system
do not have to go through first pass metabolism
what are the consequences for a molecule to not go through the liver by first pass metabolism
- substance gets absorbed more quickly
( increased speed of onset)
2.substance structure remains in tact b/c it doesn’t get altered by the liver
( greater chemical intactness= initial bioavailability)
what are other routes of entry called?
parenteral ( beyond the intestine) routes
anything other than digestion
what does “par” mean
beyond
what does “enteron” mean
intestine
T or F: Do all molecules eventually reach the liver?
Yes, but it takes a bit of time
intraoral/ buccal (cheeks)/ oral-buccal/ sublingual
entry directly from the mouth
how long does it take for a molecule to move from the mouth to the brain?
3 min
intranasal/ insufflation/ snorting
absorption through the nose
how long does it take for a material to move from nose to the brain?
3 min
rectal
absorption via the booty! oh yeah.
blood vessels
what is a suppository
drug delivery system in which the drug is in the suppository and is inserted into the rectum and absorbed by blood vessels there
waxy material that has the drug in it
how long does it take for a substance to move from the booty to the brain?
3 min
what is an enema
procedure in which liquids are inserted into the anus
transdermal
across the skin
contact absorption
how long does transdermal absorption take?
minutes to hours
patches are designed to be taken in slowly at a time
inhalation/ smoking
inhalation : inhlaing or breathing something into the longs
smoking is burning something and then taking it in, substance is available as a vapor as result
for example: weed is burned and then the vapors are taking in
what is the fastest route of entry into the brain? and why?
inhalation
lungs have lots of surface area with many blood vessels, that can absorb things quickly
how long does it take for a substance to move from the lungs to the brain?
10 sec
what are the 4 different types of injections?
- IV ( intravenous)
- IM ( intrmuscualr)
- IP ( intraperitoneal)
- SubQ (subcutaneous)
how long does IV ( intravenous) take to get to the brain?
20 sec, 2x fast as inhalation
directly into the blood stream
how long does IM ( intramuscular) take to get to the brain?
3 min
through the muscle
how long does IP ( intraperitoneal) take to get to the brain?
3 min
through the peritoneum ( body cavity which has lots of blood vessels)
many used in animals, such as mice
how long does SubQ take to get to the brain?
many minutes
under the surface of the skin
T or F: injection is most efficient for water soluble substances
T
what invention made IV possible?
hypodermic syringe
What is one of the problems with using injections?
increases the risk of toxic effects
what is the most efficient way of substance entry?
intravenous
what has the most dangerous potential of drug administration?
Injection
what are the two risks with using injection?
- possibility of infections
2. problem of overdose
what are the two types of infections from using injections?
- topical (skin) infection at the injection site
2. blood-borne infections
what are some examples of blood-borne infections?
- bacteria, other microbes, sepsis ( body has an inflammatory response due to an infection)
- virus: HIV, hepatitis ( inflation of the liver)
bacterial or virus
what doesn’t get eliminated from the body?
heavy metals
what is the route of elimination?
liver, bile, intestines,
kidney, bladder, urine
what is the lifetime of a drug in the body?
time it takes to eliminate half the drug
Describe route of administration for oral digestion
takes a long time and concentration is fairly low
insufflation/ im. injection ( from graph)
absorbed more quickly so higher concentration
inhalation/ iv injection
shorter time and faster effect, bc the initial concentration comes in fast
What is the main idea of the graphs?
faster routes of entry have bigger effects bc concentrations come on quickly
blood level/ onset kinetics and subsequent elimination from single dose..order from fastest to slowest
- inhalation, smoking, IV
- intranasal, oral- buccal, IM
- oral-digestive, transdermal
What is the difference of the natural of the blood vessels in the brain/ spinal cord (central nervous system) and other parts of the body
tightly joined cells makes up the walls of the blood vessels in the central nervous system ( brain and spinal cord)
what facilitates the tight junctions in the brain?
astrocytes
What is the result of the tight vessels?
blood-brain barrier
what are the two ways a substance can get through the BBB?
- transport
2. diffusion
what is transport?
there is a specialized protein that is in the cell wall of the blood vessel, and the protein takes things from inside the blood and moves it to the brain tissue.
move things from one side of the cell membrane to the other
what gets glucose (sugar) and amino acids to the brain?
transport proteins
what method do drugs use to get through the BBB?
diffusion
what is diffusion?
molecules just dissolve across the cell walls
what makes up blood vessel walls?
phospholipid bilayer
T or F: all cells from all life on earth and any parts of the body have a phospholipid bilayer membrane
T
what type of molecules use diffusion to get through the phospholipid bilayer?
hydrophobic ( scared of water- dont like water)
glucose and amino acids get to the brain via what process?
passive transport
hydrophobic molecules ( alcohol) get to the brain via what process?
diffusion
is alcohol soluble in water?
it depends. Simple alcohols like methanol and ethanol are, but as the hydrocarbon chains get larger the alcohol becomes less soluble.