This blog post explores the origins of aspirin, its diverse pharmacological actions, and its journey in disease treatment.
Have you ever heard of the substance called acetylsalicylic acid (ASA)? While the name may sound unfamiliar, this substance is an astonishing medication consumed by humanity at a rate of over 100 million tablets daily worldwide. It has sparked a major revolution in the medical field and plays a crucial role in preventing and treating various diseases. With over 60 billion tablets sold annually, it is an extremely familiar substance readily available around us. Acetylsalicylic acid is considered one of the most important inventions in pharmaceutical history, and its efficacy continues to expand through ongoing research and clinical trials. Another name for acetylsalicylic acid is Aspirin.
The word ‘Aspirin’ is the brand name given to the drug by Bayer, the company that first purified and marketed acetylsalicylic acid. This name also symbolizes a groundbreaking advancement in the field of pharmacology. Although the method for purifying acetylsalicylic acid was discovered by Bayer in 1893, the medicinal effects of this substance are not limited to modern inventions. The antipyretic action utilizing salicylic acid, the primary active component of acetylsalicylic acid, has existed for much longer. As a drug continuing a long medical tradition dating back to ancient civilizations, its efficacy has been proven over thousands of years.
Salicylic acid is found in willow bark, and Hippocrates, the pioneer of ancient Western medicine, discovered its fever-reducing properties. This discovery was a revolutionary medical advancement for its time and greatly influenced subsequent medical research. Over 2000 years later, the English clergyman Edward Stone administered white willow bark juice to 50 feverish individuals, confirming its antipyretic effect. This experiment was one of the earliest attempts to scientifically validate the medicinal properties of nature during the dawn of modern medicine. Edward Stone presented the fever-reducing properties of willow bark at the Royal Society in London. Furthermore, over 60 years later, Italian chemist Raffaele Piria isolated salicin from willow bark and, through several chemical reactions, obtained salicylic acid. This process is recorded as a significant example in modern chemistry of synthesizing drugs using natural substances. Around the same time, salicylaldehyde was extracted from wild dogwood flowers, which could be oxidized to yield salicylic acid. Bayer combined the first letter ‘A’ of acetylsalicylic acid with the scientific name of the dogwood tree to name it ‘aspirin’ and began marketing it. Thus born, aspirin later established itself as one of the most widely used pharmaceuticals worldwide.
Why do so many people take acetylsalicylic acid daily? It’s because acetylsalicylic acid possesses so many benefits that it’s often called a panacea. Since its discovery, acetylsalicylic acid has been primarily used as a pain reliever, providing analgesic effects for various pains alongside its well-known antipyretic action. Beyond this, aspirin possesses broad pharmacological properties capable of addressing numerous diseases. It also has anti-inflammatory effects that reduce inflammation and suppresses rejection reactions. Its role is particularly valued in situations where the immune system overreacts. Furthermore, it influences hormonal activity, physiological processes, pharmacological actions, anti-inflammatory effects, and immune suppression, making it useful for nephrotic syndrome, various allergic diseases, and rheumatic conditions. Consistent aspirin intake also helps prevent cardiovascular disease, dementia, and various adult-onset diseases. For these reasons, aspirin is recommended as a key preventive medication in numerous clinical guidelines. Research by Professor Jack Cuzick’s team even suggests it lowers cancer incidence and mortality risk. These findings indicate aspirin is a versatile drug, far beyond a simple pain reliever.
So how does acetylsalicylic acid work to relieve pain? To understand this, we must first grasp the mechanism of pain generation. When cells in our body are damaged, the enzyme cyclooxygenase (COX) converts arachidonic acid into prostaglandins, substances that act as pain messengers. This prostaglandin triggers pain, alerting us to cellular damage and signaling bodily abnormalities. This process is one of the body’s natural defense mechanisms for self-protection.
However, acetylsalicylic acid preferentially binds to the site where COX should act on arachidonic acid, inhibiting the conversion of arachidonic acid into prostaglandin with COX’s help. Consequently, we no longer feel pain. Furthermore, inflammation occurs when prostaglandin derivatives are overproduced. Since acetylsalicylic acid inhibits prostaglandin production, it can also exert an anti-inflammatory effect by reducing inflammation. Thanks to this mechanism of action, acetylsalicylic acid is effective not only for simple pain relief but also for alleviating various symptoms caused by inflammation.
However, like most medications, acetylsalicylic acid is not a perfect drug. As introduced earlier, while it possesses many benefits, side effects also exist. For instance, prostaglandins perform various physiological functions beyond simply being pain-inducing substances. The analgesic effect merely prevents the sensation of pain; it does not directly treat the underlying bodily abnormality causing the pain. Furthermore, prostaglandins regulate platelet aggregation, capillary dilation, gastric acid secretion inhibition, bronchial muscle contraction, and relaxation. Therefore, inhibiting prostaglandin production by taking acetylsalicylic acid can lead to side effects like stomach pain or excessive bleeding. Particularly, the risk of gastrointestinal bleeding becomes a major concern with long-term use, and separate medication or management may be necessary to prevent these side effects.
Acetylsalicylic acid, or aspirin, is designated as a national essential drug and is available to anyone without a doctor’s prescription. However, as the saying goes, too much is worse than too little. While aspirin possesses many benefits, like any medication, it can become harmful when overdosed or misused. Understanding how acetylsalicylic acid works and taking it appropriately is essential for this medication to support your healthy life. Furthermore, it is important to avoid long-term use or overuse without a doctor’s instructions and to consult a professional as needed.
