Aspirin from tree bark to bayer a drug for the ages
1 / 49

Aspirin: From Tree Bark to Bayer – A Drug for the Ages - PowerPoint PPT Presentation

  • Uploaded on

Aspirin: From Tree Bark to Bayer – A Drug for the Ages. James Sur, M.D. History of Medicine The University of Chicago. How Much Do You Know?. What is the chemical name of Aspirin? Who is responsible for discovering Aspirin? What are the current medicinal uses of Aspirin?

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Aspirin: From Tree Bark to Bayer – A Drug for the Ages' - jaden

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Aspirin from tree bark to bayer a drug for the ages l.jpg

Aspirin: From Tree Bark to Bayer – A Drug for the Ages

James Sur, M.D.

History of Medicine

The University of Chicago

How much do you know l.jpg
How Much Do You Know?

  • What is the chemical name of Aspirin?

  • Who is responsible for discovering Aspirin?

  • What are the current medicinal uses of Aspirin?

  • It’s not just for pain anymore….

  • We will attempt to answer all of these.

A case of course l.jpg
A Case, of course …

  • Mr. Cinchona is a 67 year old guy who comes to your clinic for primary care. He is proud that he is on no medications and feels great. He’s never been sick, oh except for the little stroke he had 4 years ago but aside from a little weakness in his fingers, he is back to feeling “strong like bull.”

  • He says his cholesterol was 160 two years ago.

  • His wife agrees but is also concerned about a polyp he had removed on a colonoscopy he had when he was followed up with screening around the time of his stroke.

The case l.jpg
The Case …

  • You examine Mr. Cinchona and you find:

    • Afebrile, 137/92, 88, 14, 98% RA, he is “bull like” as he almost knocks you over with his arm strength. You also notice he smells like a pack of Marlboro’s and he admits to having a smokey treat every once in a while.

  • What can you offer Mr. Cinchona aside from the usual screening that might help keep him healthy?

  • What about aspirin? …

Ahhh molecular sructures and for those that loved playing with the models in orgo l.jpg
Ahhh, Molecular Sructures … and for those that loved playing with the models in orgo…

Visual daily double l.jpg

Visual Daily Double playing with the models in orgo…

Visual daily double worth one bag of swedish fish l.jpg
Visual Daily Double playing with the models in orgo…Worth: One Bag of Swedish Fish

  • Who Dat?

That is correct l.jpg
That is Correct! playing with the models in orgo…


460 BC - 377 BC

The history of aspirin l.jpg
The History of Aspirin playing with the models in orgo…

  • 400 B.C. – None other than the father of medicine himself, the Greek formerly known as Hippocrates, was said to recommend a brew made with leaves from the willow tree (Cortex salicis) to ease pain of certain eye diseases and of childbirth.

Aspirin makes the bible l.jpg
Aspirin makes the Bible! playing with the models in orgo…

  • The Old Testament Book of Leviticus reads in one passage in reference to the medicinal benefits from the fruits of the willows:

    • 'boughs of goodly trees, ... willows of the brook'

Rolling into a d times l.jpg
Rolling into A.D. times… playing with the models in orgo…

  • 100 AD – Dioscorides, a Greek surgeon suggests:

    • “The leaves [of the willow] being beaten small and dranck with a little pepper and wine doe help such as are troubled with the Iliaca Passio [colic]... The decoction of ye leaves and barck is an excellent formentation for ye Gout ... “

And for ye gout and more l.jpg
And for Ye Gout and More… playing with the models in orgo…

  • Caius Plinius Secundus (AD23-79) records in his Natural History recordings many uses of ash for the willow, one of which was for sciatica.

Like the sands through the hour glass l.jpg
Like the sands through the hour glass … playing with the models in orgo…

  • Not much was written or modified on Hippocrates’ initial remedy from the willow tree until the 17th century when the fruits of the “fever tree” were cultivated in South America.

  • In 1633, an Augustinian Monk named Calantha living in Peru described how bark from this “fever” tree, made into powder and given as a beverage cured high fevers.

History has it l.jpg
History has it … playing with the models in orgo…

  • In 1638, Calantha used this product to treat the Countess of Chinchon, wife of the viceroy to Peru who fell ill to a wicked case of malaria.

  • The Jesuits began importing this tree bark back to Europe where it became known as Peruvian or Jesuit bark.

  • Call it what you want – Cinchona, Jesuit, Peruvian, whatever – it worked and was used for over a century to treat fevers when the active principle was finally isolated – it was QUININE.

History rolls on l.jpg
History rolls on … playing with the models in orgo…

  • What does Quinine have to do with aspirin?

  • Good Question.

  • The bitterness of the quinine was the basis for the next chapter in the history of Aspirin. After a few Gin and TONICS (quinine) an English clergyman named Rev. Edward Stone, decided to walk through a marsh and start tasting bark from trees … some one needed to be cut off!

History tells the story l.jpg
History tells the story … playing with the models in orgo…

  • 1758 – Rev Stone recognized a similarity in the bitterness of the cinchona bark and its quinine and that of the taste of the bark from the white willow tree (Salix alba).

Paracelsus s doctrine of signatures l.jpg
Paracelsus's playing with the models in orgo… “Doctrine of Signatures”

  • So many believed that the best place to find cures for disease was in the same place it was caused.

  • In that, many people with rheumatic diseases used to complain in damp environments of worsening pain and even fevers.

  • Rev. Stone, using this doctrine, with the bitter flavor of the willow bark, a tree that grew in damp marshy environments, might be a link to treating fevers and rheumatism.

To the lab good reverand l.jpg
To the Lab good Reverand … playing with the models in orgo…

  • 1763 - Rev. Stone made an extraction from the willow bark and administered it to 50 people.

  • His extraction was effective in reducing fevers and he presented this to the president of the Royal Society in 1763 (The New England Journal of the 1700’s in Europe.)

Willow bark takes off l.jpg
Willow Bark Takes off! playing with the models in orgo…

  • Cinchona Bark remained as the staple for treating fevers until it gradually became scarce and was then replaced with the willow bark preparation.

A few years later l.jpg
A few years later … playing with the models in orgo…

  • 1828 Johann Buchner, professor of pharmacy at the University of Munich, isolated a tiny amount of bitter tasting yellow, needle-like crystals, which he called salicin.

  • Two Italians, Brugnatelli and Fontana, had in fact already obtained salicin in 1826, but in a highly impure form.

  • By 1829 Henri Leroux had improved the extraction procedure to obtain about 30g from 1.5kg of bark.

Meadowsweet l.jpg
Meadowsweet playing with the models in orgo…

  • 1831 Johann Pagenstecher, a pharmacist from Berne, had obtained salicylaldehyde by distilling the flowers of meadowsweet, and sent it to a German chemist, Karl Lowig.

  • 1835 Lowig oxidized it to an acid that he called spirsaure - later proved to be identical to salicylic acid.

We re getting there l.jpg
We’re Getting there … playing with the models in orgo…

  • In 1838 Raffaele Piria, around the same time, then working at the Sorbonne in Paris, split salicin into a sugar and an aromatic component (salicylaldehyde). He soon converted the latter, by hydrolysis and oxidation, to an acid of crystallised colourless needles, which he named salicylic acid.

By chance l.jpg
By Chance … playing with the models in orgo…

  • Two sources of salicylic acid (meadowsweet and willow bark) were cultivated to keep up with the demand from those patients seeking relief of their fever and pain.

  • Unfortunately though, no pain no gain ….

So much more is right l.jpg
SO Much More is Right! playing with the models in orgo…

  • The current preparations came with distressing side effects – Severe irritation of the mouth, esophagus, and stomach as well as tinnitus.

Sodium the great neutralizer l.jpg
Sodium, the Great Neutralizer! playing with the models in orgo…

  • Not so much … attempts to neutralize the salicylic acid as a neutral sodium salt were done without much improvement.

  • This formulation however was endorsed globally because it was felt to be a step in the right direction.

Finally a new kindler gentler asa l.jpg
Finally, a new kindler gentler ASA! playing with the models in orgo…

  • 1853 – French Chemist, Charles Frederich Gerhardt combined sodium salicylate and acetyl chloride to get an entirely new compound … acetyl-salicylic acid (ASA).

Any credit for gerhardt l.jpg
Any credit for Gerhardt? playing with the models in orgo…

  • No.

  • He found this acetyl group addition did buffer the compound however was a very tedious and complex procedure so he unfortunately abandoned his research on the topic.

  • He also died at age 40 never to have a chance to revisit his work.

Hoffman is the man l.jpg
HoffMAN is the MAN! playing with the models in orgo…

  • At least the story books say so …

  • Felix Hoffman, a young chemist working for the pioneering pharmaceutical firm of BAYER, had an interest in this acetyl- salicylic acid as an alternative to still being used sodium salicylate.

More on the hoffmeister l.jpg
More on the Hoffmeister playing with the models in orgo…

  • Hoffman was Born in Ludwigsburg, Germany in 1868,started his career as a dispensing chemist after leaving school, fascinated, he decided to study pharmacy and chemistry in Munich.

  • In 1891 he achieved the first great success of his life - he completed his pharmaceutical studies at Munich University with honors. He continued to study chemistry and successfully completed his doctorate in 1903.

  • When Felix Hoffmann retired in 1928, "his" Aspirin® was known throughout the world. He, however, lived unrecognized until his death on February 8, 1946 in Switzerland. There he devoted himself to a passion which had nothing to do with pharmacy and chemistry, namely the history of art.

Aspirin is born l.jpg
ASPIRIN IS BORN! playing with the models in orgo…

  • 1897 – August 10th – first sample prepared by Hoffman - tries it out on his pops, he loves the stuff for his rheumatism – couldn’t handle the sodium salicylate.

  • A- Acetylation, SPIR – Spiraea ulmaria (meadowsweet), IN – that’s what they were ending drug names with in those days.

  • 1899 – Bayer releases acetyl-salicylic acid in a powder form for medicinal purposes, credits Hoffman with the discovery, patent approved!

Patent submission get out your glasses l.jpg
Patent Submission – Get out your glasses! playing with the models in orgo…

Hoffman gets it done in the us too l.jpg
Hoffman gets it done in the US too! playing with the models in orgo…

History is written by the winners l.jpg
History is written by the WINNERS? playing with the models in orgo…

  • What’s a good history talk without a little conspiracy …

  • Remember:

    • 1853 – French Chemist, Charles Frederich Gerhardt discovered the new compound … acetyl-salicylic acid (ASA).

    • Hoffman - "his" Aspirin® was known throughout the world. He, however, lived unrecognized until his death on February 8, 1946

    • Aspirin supposedly produced in Hoffman’s lab in August, 1897 and patented in 1899.

Who is arthur eichengr n l.jpg
Who is Arthur Eichengr playing with the models in orgo…ün?

  • Jewish Scientist - Hoffman’s boss at Bayer.

  • Credited with many other acetylation discoveries including acetylcellulose.

  • Held in Theresienstadt concentration camp for 14 months starting in 1944 after being banned from civil service and independent positions in the professions.

  • Not in the position in Nazi Era to report what he says is the truth about aspirin …

Eichengr n ignored l.jpg
Eichengr playing with the models in orgo…ün Ignored!

  • He actually narrows the spectrum of salicylic derivatives to find acetylsalicylic the superior form for efficacy and minimal side effects.

  • Hoffman simply follows his instructions in the lab.

  • 1946 - when Hoffman dies and is celebrated for “his” Aspirin, Eichengrün is forced silent by the Nazi regime.

  • His discoveries of acetylcellulose in the Hall of Honour (chemical section) at the German Museum in Munich, remain uncredited to this day.

  • 1949, the year he died, his letter is released reporting all this – it remained largely ignored until the 1990’s when many of his claims were verified.

So back to bayer l.jpg
So Back to Bayer … playing with the models in orgo…

  • Mass production of ASA!

  • Finally pill form in 1900 as 500mg tablets.

  • It’s uses spread like wildfire throughout US and Europe.

The first rct ok so not randomized or controlled l.jpg
The First RCT? …Ok, so not Randomized … or controlled

  • April 1899 - First clinical trials of ASA as an antipyretic carried out by an internist, Dr. Kurt Wittauer, at Deaconess hospital in Halle. The findings are published the same year in a journal entitled "Die Heilkunde" ("Medical Science").

And the hits just keep on comin l.jpg
And the Hits just keep on Comin’!

  • 1900 - Bayer releases water soluble tablets – first drug sold in this form, cuts cost in ½.

  • 1911 Bayer refutes imposter aspirins, advertises its ASA as the true aspirin – Ironically also states – DOES NOT AFFECT THE HEART>>>>>>>>>>

  • 1912 – Kafka mentions aspirin in his letters to Bauer.

  • 1915 – Aspirin available without a prescription.

Doh patent is up l.jpg
DOH, Patent is up!

  • 1917 - Bayer loses its patent in many major marketed countries.

  • 1919 WWI – US ceizes Bayer operations.

  • 1919 - The Bayercompany name and trademarks, including Aspirin®, are auctioned off in the USA to highest bidder, Sterling Products Company, later - Sterling Winthrop. The pharmaceutical company wins the auction w/ offer = $5.3 Mil.

The wonder drug l.jpg
The Wonder Drug

  • 1953– Dr. Lawrence Craven reports in the "Mississippi Valley Medical Journal" about 400 of his patients on ASA without MI!

  • 1968 – Aspirin to the Moon! – Accompanies Armstrong and Apollo 11 in its medicine cabinet.

The era of aspirin its not just for pain anymore l.jpg
The Era of Aspirin – Its not just for pain anymore!

  • 1971 - Smith and Willis, from the United Kingdom, first to prove that the blood-thinning properties of ASA are based on its inhibition of prostaglandin synthesis in platelets.

  • June 23, 1971 - Sir John Vane, Pharmacologist at the London Royal College for Surgeons, publishes his studies on mode of action of ASA titled "Inhibition of Prostaglandin Synthesis as a Mechanism of Action of Aspirin-like Drugs" in the journal "Nature."

The story continues to unfold aspirin s second career l.jpg

1980 – FDA approves use to reduce risk of stroke after TIA in men. (Stroke, 1977), (NEJM 1978)

1982 –Sir John Vane awarded nobel prize for his work.

1985 – FDA approves use of ASA to prevent MI in pts with previous MI (NEJM 1983) or UA history (NEJM 1985).

1996 – FDA proposes change of label to include its use in acute management of MI.

1997 – FDA broadens its recommendations in prevention of stroke to include women w/ TIA history, Men and women with minor stroke or MI history - and in lower doses (NEJM 1991) .

1998 – FDA officially endorses:

Reduces risk of death in AMI

Prevents recurrent CVA/TIA

Low Dose ASA reduces risk MI or CVA

The Story continues to unfold – Aspirin’s Second Career…

Aspirin round three l.jpg
Aspirin – Round Three… in men.

  • 1988 – Australian Surgeon G. Kune shows may reduce risk of colon cancer.

  • 1991 – NEJM validates Dr. Kune’s claim with 600,000 patient megastudy, reduces colon cancer by 40%.

  • 1995 – Another study in NEJM by Harvard group shows colon cancer reduction of 44%.

  • 2003 Findings revalidated in NEJM in those with polyps or previous colon cancer – less incidence or recurrence.

Others l.jpg
Others … in men.

  • 1994 – Metanalysis shows less DVT/PE.

  • 1997 – Aspirin endorsed for preventing migraines.

  • 1999 – HAPPY 100th BIRTHDAY ASPIRIN!

  • 2002 – Annals of IM metanalysis endorses aspirin use for the primary prevention of ischemic stroke, MI, and cardiovascular death if your Framingham risk is above 5% for 5years.

We re almost done l.jpg
We’re almost done… in men.

  • So what about our patient from the beginning, Mr. Cinchona – should we give him an aspirin?

  • What is his Framingham risk?

  • Age – 67, Smoker, Chol 160, SBP 137 = 20%

  • Hx of CVA

  • Hx of colon polyps

And about those questions for some more swedish fish l.jpg
And about those questions? For some more Swedish fish… in men.

  • 1. What is the chemical name of Aspirin?

  • 2. Who is credited for discovering Aspirin?

  • 3. What are two current medicinal uses of Aspirin?

References l.jpg
References: in men.

  • 1. Elwood PC. Aspirin: past, present and future. [Historical Article. Journal Article] Clinical Medicine. 1(2):132-7, 2001 Mar-Apr.

  • 2. Sneader W. The discovery of aspirin: a reappraisal. [Biography. Historical Article. Journal Article] BMJ. 321(7276):1591-4, 2000 Dec 23-30.

  • 3. Manley L. A look back: the wonder drug. [Historical Article. Journal Article] Journal of Emergency Nursing. 26(1):75, 2000 Feb.

  • 4. Anonymous. The discovery of aspirin. [Biography. Historical Article. Journal Article] Nursing Standard. 13(21):33-4, 1999 Feb 10-16.

  • 5.

  • 6.