Midterm 1 Flashcards
What are important considerations when buying drugs?
Safety: side effects, its effect and the incidence of it happening
Indications:
Counter-indications:
*
What is the most common OTC drug?
$______per year in North America, ________ tablets consumed in North America, ______tonnes/year, ____ dump trucks used in transport of it
Pain relievers $4.1 billion 50 billion 16,000 500
What is one of the worlds most popular drugs?
Alcohol
Caffein
Aspirin
Nicotine
What is the origin of aspirin?
Origin of aspirin comes from ancient uses of willow which contains salicylates used as drugs(poison) or aromas and flavour. Used by Sumerians for pain treatment in 2200BC, Egyptians in ancient Egypt for inflammation, reuptake in willow after loss of herb knowledge in dark ages by reverend Edward stone who described treatment for ague in 1763 as the rector for the Church of England.
What are some plants that contain salicylates?
Willow trees
Poplar trees
Beech trees
Wintergreen trees
Describe the taste of willow bark and what Reverand Edward Stone believed it to taste like?
bitter taste
Similar to quinine
Doctrine of signatures
Association between disease and cure, they derive a cure from associations of disease, that eating something that resembled body shape was good for it, ie. walnut-brain, boneset stem-bone, shark cartilage-anticancer, chlorophyll-fresh breath, mandrake roots-magical possession, rhino horn-aphrodisiac, mercury-purgative, avocado/eggplant/pear-prevent cervical cancer
Willow bark for treatment of fever (method of administration and negative effects)t
dried bark was ground up to a powder
It was expensive, limited supply and variable in effectiveness.
Describe the shift from usage of willow to its chemical drug ingredient.
Salicin was isolated from willow bark in 1829. Very little salicin was achieved from a lot of bark. Willow only contains 0.02% of salicin. In 1838, salicylic acid was discovered as a better drug than salicin. Natural salicylic acid occurred in meadowsweet flowers( again same problem as salicin that the plant had very little active ingredient in it and it was expensive since it was hard to get). It was analgesic, antipyretic, and antinflammatory. Through the Kolbe-Schmitt reaction, we were able to manufacture salicylic acid from coal tar which was easy to produce in large amounts since it was a waste product in 1800s.
Reactants to produce salicylic acid using natural vs synthetic reagents
Natural willow bark****
Who became drug companies?
Dye companies specialized in coal tar chemistry
What were the issues salicylic acid had as a drug in the 18/1900s?
– Analgesic – Antipyretic – Antinflammatory – Bitter taste – Stomach irritation
What are the benefits and side effects of A.S.A?
Benefits – Pain – Fever – Inflammation – Reduce heart attack risk -effective for muscle pain
Side effects – Tinnitus – Stomach irritation – Interferes with blood clotting -not effective for visceral pain
How does aspirin work>
Aspirin destroya cyclooxygenase which blocks the enzyme machine action which blocks it from creating a local hormone called prostaglandin which causes the pain, fever, and inflammation.
Stomach protection
Aspirin blocks production of prostaglandin which help protect the stomach by decreasing acid production and increases mucus production. Blocking production means an increase in hCl produced in stomach.
What have been ways to reduce irritation by aspirin tablets?>
Bufferin-contains an antacid (MgSO4 gypsum) and pills dissolve quickly
Plastic ASA coated tablets
Increase hydration(water)
Reye syndrome and influenza for children association?
Children’s aspirin no longer available, no causative link between asa and rye syndrome, removed from market in Canada as a precaution and its association
What is the difference between a cause and association ?
An association between two things does
not mean that one thing influenced
(caused) the other
What establishes some thing as a cause and effect?
Requires a body of evidence: – Association between two things – Control experiments changes in the other • Eliminate other possibilities – Experiments with animals – Biochemical explanation of the effect – Deliberately change one factor to look for
What establishes the cause and effect of stomach irritation and aspirin?
– Ulcers common in people who take Aspirin (long
term)
– Ulcers less common in people who don’t use Aspirin
(control) – Aspirin dosing in rats results in more ulcers (animal)
– Prostaglandin production in stomach lowers stomach
acid and increases mucus production (biochemical)
– Aspirin use raises stomach acid and decreases
mucus production
• Aspirin inhibits prostaglandin production
– Stomach irritation reduction if stop taking Aspirin
(change, animals)
Name brand vs generic drug medications
Generic drugs are the same quality as name brands
• Same chemical substance
• Same dosage
• Equivalent bioavailability: means the same amount of drug enters the body
How should you go about finding medical information?
Check multiple websites, since health-related web can be very misleading.
Some red wines contain ________.
Histamine
Red wine headaches why?
People feel like they get headaches from certain red wines