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
Fermented foods contain _____.
Histamine
Some aged cheeses contain ______.
Tyramin
What compounds can trigger headaches?
Histamine (grape skin, fermented food)
Tyramine (cheese)
Phenylethylamine (chocolate)
Nitrites (hotdogs)
Describe nitroglycerin
Nitroglycerin is potent vase dilator gives headaches because it causes blood vessels to dilate which causes nitrite gases
Why did dynamite workers gets headaches on the job but not on the weekend?
Dynamite was created from nitroglycerin Because they would no longer be breathing in the nitroglycerin
MSG- monosodium glutamate
Food created would be more flavourful, a compound found in seaweed found by Kikunae Ikeda.
In the 1960s somebody made an association known ans Kwok syndrome (or Chinese restaurant syndrome)which later had an impact on oriental cooking restaurant sales. Research on msg concluded that it didn’t create headaches .
How is msg disguised?
Vegetable protein (hydrolysed)
Msg in human body
It is a normal human metabolite (constantly produced), and constitutes 5% of our protein.
Caffeine effect in our body
Caffeine causes vasoconstriction, large consumptions of caffeine will cause body to compensate by trying to initiate vasodilation, any reduction in caffeine intake will cause the body to rebound and cause vasodilation
Brain freeze
Blood vessels expand in head to try and warm body (a warning mechanism)
What medicines can treat toxic headaches?
Naproxen
Ibuprofen
A.S.A -
Acetaminophen and toxic headaches
Increased liver function causes acetaminophen toxicity (liver damage)
What is a migraine
A small percentage of the population get headaches, it lasts for hours, it has two stage:
Phase 1: vasoconstriction
Phase 2: vasodilation
__% of women get migraines
__% of men get migraines
18; 6
What are triggers that can initiate migraines?
- Tension
- Lack of sleep
- Menstruation
- Foods
- Relaxation
- Too much sleep
- Pregnancy
- Drugs
- Strong smells
What are the progressions of a migraine?
- Prodrome phase
- Aura
- Pain
- Postdrome
Not all experienced
What is a prodrome phase?
___% to ___% of sufferers
It’s a warning through mood swings.
30; 40
What is aura phase?
__% to __% of sufferers
Occurs 1-2 hrs before pain phase, experience scotomas which are visual disturbances like flashes of light, or olfactory hallucinations, or auditory hallucinations or vertigo or reduced sensation or hypersensitivity.
What are symptoms from the pain phase of a headache.
Hemicrania/hemigrania
Involves half the head, and can last 1-72 hrs. Where nausea is common, or gastrointestinal disturbances, and movement increases pain level.
What can migraines cause sensitivity to?
Light
Sound
Smell
What is the postdrome phase of migraines?
Can last hours or days, feelings of being “hungover”, exhaustion, poor concentration, depression or euphoria.
What are treatments fro a migraine
To take pain medication (such as: A.S.A, acetaminophen, ibuprofen, naproxen, and prescription pain meds) and to ride out the symptoms
What can abort a migraine
Triptans
Rye use in medieval times
To 1862
To 1918
Ergot is a fungus that grows on rye, strong dose could produce St.Anthony’s fire or gangrene in humans caused from vasoconstriction and requires amputation, produces involuntary muscle contractions (helps induce labor), powerful hallucinogen (which was seen as demonic possession).
1862: Extracts of ergot could cure migraine
1918: ergotamine was isolated
What is the issue with ergotamine
Not user-friendly since is a poison in high dose such as hallucinations, muscular contractions, vasoconstriction, gangrene or death. But only prevents migraine. Dosage difference is not very big.
What is a drug-like substance? It should be:
Effective
Safe
Convenient fro the user
Cheap
LSD
A hallucination discovered by accident by Albert Hoffmann through testing of ergotamine.
Differences and similarities between LSD and ergotamine
Similarity: hallucination
Differences (ergotamine): stops migraine, muscular spasms, gangrene, death, st.andrews fire
Serotonin effect in a migraine
Serotonin levels drop during aura migraine phase, use a drug that mimics serotonin
Nerve signals are cascading _______ reactions
How do they interact?
Chemical
Nerve cells dont touch, they interact through the synapse
Why is serotonin a poor drug
Because serotonin is used in many parts of the brain (the drug must affect a certain symptom), serotonin doesn’t easily pass from blood to brain (th drug needs to travel into the stomach into the brain by the bloodstream.
What are the triptan options for migraine?
Sumatriptan Rizatriptan Naratriptan Zolmitriptan Eletriptan Almotriptan
What is the most common infection
Cold (25:1)
More than ___ viruses cause cold.
200
What happens when you get a cold.
The virus destroys tissue, and the immune system responds with symptoms
What method spreads virus easily
Nasal secretions therefore transferred by touching
What environments do colds become more common in?
Crowds
School season
What is made from coal tar?
Antikamnia or atifenbrin
What was Carl Duisburg’s role in pharmaceutical drugs?
Needed to to get rid of aminophenol waste. Converted waste product into drug called phenactin. Widely used called APC which combines aspirin phenacetin and caffeine.
What is metabolism
Body chemically alters substances to get rid of it
How does the body métabolisé antikamnia and phenacetin
It metabolizes it into acetaminophen
What does acetaminophen do?
Relives pain, has nothing to do with prostaglandins but will raise body’s pain threshold, thus it’s not only good for muscle pain but all types of pain like visceral pain. It is antipyretic means it can lower fever but can’t reduce swelling or inflammation since it can’t inhibit prostaglandin synthesis. It helps osteoarthritis but will not help rheumatoid arthritis as much since it has swelling elements.
Stomach irritation in A.S.A vs acetaminophen
A.S.A - strong irritation (chronic)
Acetaminophen - weak irritation
Death in acetaminophen
More than 60 tablets
Describe acetaminophen liver toxicity
Acetaminophen is metabolized in two ways
Safe pathway: metabolized into glucuronyl transferase is removed from body
Toxic pathway: metabolized into cytochrome p450 which causes liver damage
Why is acetaminophen poisoning very common?
Since its a safe drug it is put in many prescription meds and users may take a second does of acetaminophen from their off-the counter medication as they dont know that the acetaminophen is also in their prescription medications
Is there an association of rye syndrome for acetaminophen?
No, thus you can get a children’s version
Children’s Tylenol bottles
Packaged in small bottle in a appealing flavour, where child may try and consume entire bottle. Small bottle is a safety feature to ensure that it doesn’t do any substantial harm if consumed in its entirety.
Tylenol regular
Tylenol extra strength
Tylenol arthritis/muscle&body
Tylenol migraine
325 mg
500 mg
650 mg
500mg + 65mg caffeine
Tylenol-cyanide incident - 1982
Somebody repackaged Tylenol capsule with cyanide. Johnson&Johnson recalled global supply, and now caplets replaced capsules for otc medicine.
Acetaminophen benefit and side effects
Benefit:
Reduces pain & fever
Side effect:
Liver toxicity
Why is children’s medicine more expensive
Willing to pay extra price for safety of child
Ibuprofen:
Developed in _____
1961
How does ibuprofen work
Inhibits cyclooxygenase
Ibuprofen summary
Originally prescription and it inhibits cyclooxygenase
Advil price vs Motrin price
Advil more expensive than Motrin
Some red wines contain ________.
Histamine
Red wine headaches why?
People feel like they get headaches from certain red wines
Fermented foods contain _____.
Histamine
Some aged cheeses contain ______.
Tyramin
What compounds can trigger headaches?
Histamine (grape skin, fermented food)
Tyramine (cheese)
Phenylethylamine (chocolate)
Nitrites (hotdogs)
Describe nitroglycerin
Nitroglycerin is potent vase dilator gives headaches because it causes blood vessels to dilate which causes nitrite gases
Why did dynamite workers gets headaches on the job but not on the weekend?
Dynamite was created from nitroglycerin Because they would no longer be breathing in the nitroglycerin
MSG- monosodium glutamate
Food created would be more flavourful, a compound found in seaweed found by Kikunae Ikeda.
In the 1960s somebody made an association known ans Kwok syndrome (or Chinese restaurant syndrome)which later had an impact on oriental cooking restaurant sales. Research on msg concluded that it didn’t create headaches .
How is msg disguised?
Vegetable protein (hydrolysed)
Msg in human body
It is a normal human metabolite (constantly produced), and constitutes 5% of our protein.