59 Fun Facts About Aspirin

Aspirin is the genericised trademark for which chemical compound?

Acetylsalicylic acid. The name hides its parent: once swallowed, the body strips the drug back down to salicylic acid, the harsher old remedy it was built to replace.

Which tree's bark contains salicin, the natural compound that set chemists on the road to aspirin?

Willow. Salicin carries the tree's name, from salix, the Latin for willow; a Munich professor drew the bitter compound out of the bark in 1828.

Rasputin's healing fame may rest on keeping aspirin, then a new cure-all, away from a royal heir with which condition?

Haemophilia. Aspirin thins the blood, a side effect unknown at the time, so by insisting the court's remedies be kept away Rasputin may have removed the very thing that was making the boy's bleeding worse.

Which profession supplied all 22,000 volunteers for the landmark 1980s American trial of aspirin against heart attacks?

Doctors. The Physicians' Health Study gave half of them aspirin every other day, and that arm was stopped ahead of schedule: those taking it were having 44% fewer heart attacks.

Which German chemist is officially credited with first making aspirin in a pure, stable form in 1897?

Felix Hoffmann. A former colleague later insisted Hoffmann had merely carried out his instructions without knowing their purpose, and who deserves the credit is still argued over.

Chemist Arthur Eichengrün first typed his claim to have directed aspirin's invention in 1944, while held where?

A Nazi concentration camp, Theresienstadt, was where he typed it, in a letter now in the company archives. He survived to publish the claim in 1949, and a historian's 2000 archive study backed him, though the firm disputes it.

Aspirin, ibuprofen and naproxen all belong to which class of drugs?

NSAIDs are non-steroidal anti-inflammatory drugs, a label coined to set them apart from corticosteroids, the other big family that calms inflammation. American law makes every packet spell the abbreviation out.

Which notorious drug did the chemist credited with aspirin also synthesise within two weeks of it in 1897?

Heroin went on sale in 1898 as a cough remedy, promoted by its maker as a non-addictive substitute for morphine.

The 'spir' in Aspirin comes from Spirsäure, an old German name for salicylic acid that honours which plant?

Meadowsweet was then classed as Spiraea ulmaria, and salicylic acid drawn from its flowers took the German name Spirsäure. The plant has since been moved to the genus Filipendula.

American law makes aspirin packets carry a warning for people who have three or more of what every day?

Alcoholic drinks at that rate raise the chance of severe stomach bleeding from aspirin, the label must say. Acetaminophen packets carry the same three-drink line for a different organ: there the risk is liver damage.

Salicylic acid, the compound aspirin turns into inside the body, is also a staple ingredient of which products?

Acne and wart treatments use salicylic acid because it loosens the keratin that binds dead skin cells, so clogged or hardened layers peel away. Swallowed neat it is harsh on the stomach, the flaw aspirin was made to fix.

Scottish physician Thomas MacLagan reported in The Lancet in 1876 that the bark extract salicin relieved which illness?

Rheumatic fever, then called acute rheumatism, left patients burning hot with swollen joints. MacLagan swallowed rising doses of salicin himself to check it was safe before giving it to a patient, whose fever and pain soon eased.

Bayer's systematic drug search was inspired by the success of which 1886 acetanilide fever remedy?

Antifebrine was acetanilide, a dye-works chemical found to cool fevers after a pharmacy mix-up. Its sales sent Bayer's research chief hunting through his own firm's dye waste for medicines.

Why did Bayer at first refuse to advertise Aspirin to the public?

It was thought unethical: respectable 'ethical' drugs were promoted only to doctors, and pitching a remedy straight to patients was the mark of quack patent medicines. Doctors were urged to shun anything advertised that way.

In what form was aspirin first supplied to hospitals in 1899, a year before its maker launched it as tablets?

A white powder was all that hospitals and clinics received at first. Tablets followed in 1900, and the easier dosing spread the drug so fast that by 1915 it was on sale without a prescription.

During WWI, German agents secretly bought surplus phenol for aspirin from which American inventor's factory?

Edison made phenol for phonograph records; the 'Great Phenol Plot' collapsed when a briefcase of documents was seized in 1915.

Which photography company owned the American rights to Bayer Aspirin from 1988 until it quit the drug business in 1994?

Kodak had bought Sterling Drug, the firm that won the brand at a government auction of seized German assets after the First World War. When the film giant retreated to photography, the name went back to its German founder within weeks.

How much did Bayer AG pay in 1994 to regain the US rights to its own name, cross logo and Bayer Aspirin?

US$1 billion bought back a name that had been seized as enemy property in the First World War and auctioned off. For three-quarters of a century the German firm could not sell aspirin under its own name in America.

Which pandemic cemented aspirin's reputation as one of the most powerful drugs of its era?

The Spanish flu of 1918 bred a rumour that the enemy-invented tablets carried flu germs; New York's health department lab-tested shop-bought aspirin and found nothing wrong.

Which American remedy for upset stomachs, launched in 1931, was built around a dose of aspirin?

Alka-Seltzer pairs aspirin for the head with an antacid for the stomach, which is why drinkers soon adopted it as a hangover cure. Its 'Plop, plop, fizz, fizz' jingle became one of the best known in advertising.

Aspirin's sales slid from the 1950s as paracetamol, or acetaminophen, caught on in America under which brand name?

Tylenol arrived in 1955 as a children's elixir and then won over adults because it did not irritate the stomach the way aspirin can.

California GP Lawrence Craven spotted aspirin's blood-thinning effect when tonsillectomy patients bled heavily after overusing which aspirin-laced product?

Chewing gum laced with aspirin was what his tonsil patients used for the pain, and the heaviest users bled the most. Craven went on to put thousands of men on daily aspirin and reported no heart attacks, yet was ignored for decades.

In 1971 British pharmacologist John Vane showed that aspirin works by stopping the body from making which compounds?

Prostaglandins are hormone-like compounds that raise pain, fever and swelling, so shutting down their production explained all three of aspirin's main effects in one stroke.

Which honour did the pharmacologist who discovered aspirin's mechanism share in 1982?

The Nobel in Physiology or Medicine went to John Vane with the Swedes Sune Bergström and Bengt Samuelsson. His 1971 finding ended seven decades in which nobody knew how the world's most familiar pill worked.

Aspirin permanently disables which enzyme, unlike ibuprofen, which blocks it only temporarily?

Cyclooxygenase (COX) never recovers once aspirin has hit it, so one dose goes on working for days after the drug itself has gone. Ibuprofen lets the enzyme go again, which is why only aspirin is taken daily against clots.

A small daily aspirin helps prevent heart attacks by stopping which blood cells from clumping into clots?

Platelets have no nucleus, so they can never rebuild the enzyme that aspirin knocks out. One small dose therefore silences each platelet it meets for the rest of its life, a week or more.

During a suspected heart attack, emergency advice is to do what with a regular aspirin tablet?

Chew it before swallowing, because a chewed tablet reaches the blood and starts blocking the clot sooner than one swallowed whole. Coated tablets are the wrong choice in an emergency, as they are absorbed slowly.

Why is aspirin not generally recommended for children with viral infections?

The risk of Reye syndrome, a rare swelling of the brain with liver damage, follows aspirin given for flu or chickenpox. Reported American cases peaked at 555 in 1980 and fell sharply once parents were warned.

Some pregnant women are prescribed a daily low-dose aspirin from week 12 to lower their risk of which condition?

Pre-eclampsia is dangerously high blood pressure in pregnancy that can threaten mother and baby. The same drug at painkiller doses is advised against in pregnancy, above all after 20 weeks, when it can harm the baby.

What ear symptom can high doses of aspirin cause?

Ringing in the ears, or tinnitus, is a classic early warning that the dose has climbed too high. It is usually temporary and fades once the salicylate level in the blood comes back down.

Roughly how many tonnes of aspirin are consumed worldwide each year?

About 40,000 tonnes a year works out at roughly 100 billion tablets, or a dozen for every person on Earth.

Aspirin is made from salicylic acid and which reagent in a classic teaching-lab esterification?

Acetic anhydride caps the harsh part of salicylic acid, the one small change that made an old stomach-burning remedy tolerable. Factories run the same reaction students do, only by the tonne.

What hazard do aspirin tablet factories share with flour mills?

Airborne powder can be explosive because a fine dust cloud, of aspirin as much as flour, burns almost all at once when it meets a spark. Tablet plants use sealed systems and spark-proof electrics to keep it out of the air.

Which pet clears aspirin so slowly that vets who prescribe it space the doses two full days apart?

The cat holds on to the drug about five times longer than a dog, so a dose that suits a dog would build up towards poisoning.

Aspirin is normally kept from children, yet it is a standard treatment for which childhood illness that inflames blood vessels?

Kawasaki disease can damage the coronary arteries, so doctors give high doses of aspirin until the fever has gone, then a small daily dose for several weeks more.

What did three big 2018 trials of daily aspirin in adults without heart disease find?

Few benefits and consistent bleeding risks was the shared verdict of the ASPREE, ARRIVE and ASCEND trials. In 2019 American heart guidelines stopped advising a routine daily aspirin for over-70s who had never had a heart attack.

Long-term aspirin use has been linked to a lower risk of which disease of the bowel?

Colorectal cancer: in 2016 a US expert panel advised aspirin for some adults in their fifties partly to ward it off, then dropped that reason in 2022, calling the evidence unclear.

Aspirin is a generic word in much of the world, but remains Bayer's trademark in which of these countries?

Canada is one of some 80 countries where the name still belongs to Bayer, so other makers there sell the same drug under its chemical name. An American court ruled the word generic for shoppers in 1921.

In the First World War aspirin ran short because phenol, its key raw material, was being diverted to make what?

Munitions came first: phenol was also the feedstock for picric acid, a staple of the arms factories, so British supplies stopped coming. By 1915 the soaring price had left Bayer's American aspirin plant badly short.

Why did Bayer start advertising Aspirin directly to American consumers in 1915?

Its US patent was expiring in February 1917, and any firm would soon be free to make the drug. Bayer rushed to tie the word Aspirin to its own tablets before the copies arrived.

Which stomach remedy contains a salicylate, a chemical cousin of aspirin, and so shares its warning about children with flu?

Pepto-Bismol's active ingredient is bismuth subsalicylate, a close relative of aspirin. People allergic to aspirin are told to avoid it, and so are children getting over flu or chickenpox.

Headache brands such as Excedrin and Anadin Extra add which third ingredient to aspirin and paracetamol (acetaminophen)?

Caffeine is there to help the painkillers, not to perk you up. Pooled trials found that 100 mg or more added to a standard dose gives good pain relief to a few more people in every hundred.

Which US official, later notorious for the Red Scare raids, seized Bayer's American assets in WWI?

A. Mitchell Palmer, then Alien Property Custodian, took Bayer's American arm as enemy property and had it auctioned off, brand name included. Wilson later made him Attorney General.

Ancient physician Hippocrates is said to have used salicylic tea for what purpose around 400 BC?

The claim that he used willow as a painkiller is a modern myth.

Bayer's headquarters is in which German city, created only in 1930 by merging several small towns?

Leverkusen takes its name from Carl Leverkus, a chemist who moved his ultramarine dye works to the Rhine around 1860 and named the settlement that grew beside it. Bayer arrived in 1891 and made the place world famous.

Aspirin appears on which World Health Organization roster of key drugs?

An estimated 40,000 tonnes, or 50 to 120 billion pills, are consumed worldwide every year.

Old aspirin that has absorbed moisture often smells of what?

Hydrolysis breaks the drug back down into salicylic acid and acetic acid, the acid in vinegar.

What dose is commonly sold as 'baby aspirin' in the United States?

81 mg is a quarter of the regular 325 mg American tablet, and it was once the children's dose. Children are no longer given it, so the name now clings to the small daily tablet adults take against heart attacks.

Enteric-coated aspirin tablets are designed to dissolve where?

In the small intestine, where the higher pH finally dissolves the coating, so the drug never touches the stomach wall. Yet a 1996 study found coated tablets caused stomach bleeds about as often as plain ones.

Effervescent aspirin tablets typically pair citric and tartaric acids with which fizzing ingredient?

Sodium bicarbonate is plain baking soda: it reacts with the acids in water to make the fizz, and what is left over doubles as an antacid for the stomach.

Aspirin can trigger a dangerous flare-up in a minority of adults who have which common condition?

Asthma made worse by aspirin affects about 7% of asthmatic adults, a pooled analysis found. Oddly, the drug itself is one treatment: after careful desensitisation, daily doses can ease the disease.

Remedies made from salicylate-rich plants appear in Sumerian clay tablets and which ancient Egyptian text?

The Ebers Papyrus, a scroll of remedies some 3,500 years old and nearly 20 metres long, prescribes the leaves for aches and to draw the heat out of inflamed wounds.

What unexpected result did the 2018 ASPREE trial report?

Higher cancer deaths in the treated group, 3.1% against 2.3% on placebo, surprised the researchers, because aspirin was thought to protect against cancer. The authors of the 19,000-person study urged caution in reading it.

A single high dose of aspirin performs about as well as the specialist drug sumatriptan against which condition?

Migraine trials found that 1,000 mg of aspirin, about three regular tablets, eased an attack roughly as well as a standard dose of sumatriptan, and side effects were less common with the aspirin.

Plants make salicylic acid, aspirin's parent compound, as a hormone best known for helping them do what?

Fight off infections: when a virus, fungus or bacterium strikes, the plant raises its salicylic acid level, which switches on defences even in leaves the invader has not reached.

Which fragrant oil is nearly pure methyl salicylate, a relative of aspirin, and can poison a small child by the teaspoon?

Oil of wintergreen is about 98% methyl salicylate, and a teaspoon or less has killed children under six. The same chemical gives many muscle rubs their smell, so those tubes belong out of reach too.

In the traditional story, the chemist credited with aspirin wanted a gentler drug because sodium salicylate upset whose stomach?

His father's aching joints were being treated with sodium salicylate, which disagreed with him, so the son went looking for a kinder version. A 2000 study doubted the tale, which surfaced only in 1934, and says his boss directed the work.

The liver converts salicylates into inactive compounds that leave the body mainly via which organs?

The kidneys clear most of it, and they work many times faster when the urine is alkaline. That is why an aspirin overdose is treated by deliberately making the urine less acidic, to flush the drug out.

A 2025 Cambridge study in mice found aspirin may curb cancer's spread by freeing which immune cells to attack?

T cells can pick off stray cancer cells before they settle, but a clotting signal called thromboxane switches them off. Aspirin cuts that signal, and treated mice developed fewer secondary tumours; human trials are under way.