Issue 529 — Painkillers Uncovered! The TFDA Helps You Bust the Myths.

Painkillers Demystified

Painkillers are among the most commonly used medications in modern life. Over-the-counter pain relievers generally fall into two main categories: central analgesics, such as acetaminophen, and nonsteroidal anti-inflammatory drugs (NSAIDs), including aspirin and ibuprofen. These are often used to relieve headaches, menstrual cramps, and muscle pain.

Another type, opioid analgesics, are classified as controlled substances in Taiwan and can only be used with a doctor’s prescription.

Many people still have questions and misconceptions about painkillers — for instance: “Will taking painkillers make my body resistant to them?” or “Should I take a painkiller as soon as the pain starts?”

These questions involve not only the concepts of drug tolerance and resistance, but also the appropriate timing and dosage of painkiller use. Let the Taiwan Food and Drug Administration (TFDA) help you clear up the myths surrounding painkillers.

Will Taking Painkillers Lead to Drug Resistance?

First, it is important to clearly distinguish between the concepts of drug resistance and drug tolerance.

Drug resistance usually refers to a situation in which pathogens such as bacteria or viruses gradually become unaffected by the effects of antibiotics or antiviral drugs. This means that medications that were once effective may lose their effectiveness over time, making infections more difficult to control or treat.

Drug tolerance, on the other hand, refers to the human body’s reduced response to a medication after frequent use. As a result, higher doses may be required to achieve the same therapeutic effect. Unlike drug resistance, tolerance is an adaptive response of the body, not a mutation of pathogens.

Therefore, when people ask, “Will taking painkillers cause drug resistance?”, they are actually confusing resistance with tolerance. Nonsteroidal anti-inflammatory drugs (NSAIDs), unlike antibiotics, do not act on bacteria or viruses. Thus, painkillers do not cause pathogens to develop resistance.

However, long-term or frequent use of painkillers, particularly opioid analgesics such as codeine, morphine, or fentanyl, can indeed lead to tolerance. As the body becomes accustomed to the medication’s effects, it may respond less sensitively, requiring higher doses to achieve the same level of pain relief. Therefore, these medications should be used with caution and under medical supervision to avoid dependence and overuse.

Should You Take a Painkiller as Soon as the Pain Starts?

The timing of painkiller use can vary depending on the situation. When mild or short-term pain first appears, it is often advisable to observe for a while to see if the discomfort resolves on its own. In such cases, there is usually no need to take a painkiller immediately.

However, for known chronic pain conditions or specific types of acute pain, such as migraines or menstrual cramps, taking pain medication early can be more effective. Early pain control helps prevent pain signals from being amplified within the central nervous system, thereby reducing the intensity of pain later on.

The Taiwan Food and Drug Administration (TFDA) reminds the public that painkillers can be both effective and safe when used appropriately. Always follow the instructions on the medication label or prescription bag. Although painkillers do not cause drug resistance, frequent or long-term use may still lead to tolerance. If symptoms persist despite proper use, it is recommended to consult a doctor or pharmacist for further evaluation.

Source: Taiwan Food and Drug Administration (TFDA)