NSAIDs Ease Pain and Inflammation but Carry Real Risks

Reach for ibuprofen when your back aches or a headache hits? You’re not alone. NSAIDs are among the most common medicines people use to relieve pain, calm inflammation, and bring down a fever.

They can work very well when used correctly. But they’re not right for everyone — and they can cause important side effects or interact with other medicines you take.

Overview: What NSAIDs Are and What They Do

NSAIDs, or nonsteroidal anti-inflammatory drugs, are medicines that reduce pain, inflammation, and fever. Many people use them for headaches, muscle aches, back pain, menstrual cramps, dental pain, arthritis, or short-term pain after an injury. Some are available over the counter, while others require a prescription.

These medicines work by blocking prostaglandins, natural substances in the body involved in pain, swelling, and fever. Because prostaglandins also help protect the stomach lining, support kidney blood flow, and affect blood clotting, reducing them can sometimes lead to side effects as well as benefits.

NSAIDs are often helpful, but they are not suitable for every person or every type of pain. Safe use depends on the reason for treatment, the person’s age, other medical conditions, and any other medicines they take. Knowing when NSAIDs help — and when you need to be careful — makes it easier to use them safely.

Common Types of NSAIDs and When They Are Used

Common NSAIDs include ibuprofen, naproxen, diclofenac, indomethacin, and celecoxib. Aspirin is also an NSAID, although it is sometimes used for different reasons, such as its blood-thinning effect in selected patients. Not all NSAIDs have the same risk profile, and one medicine may be more appropriate than another depending on the person and the condition being treated.

NSAIDs are often used for conditions involving inflammation, such as sprains, tendon pain, some types of joint pain, and arthritis. They may also help with short-term fever or discomfort from minor illnesses. In people with ongoing joint symptoms, a doctor may evaluate whether an inflammatory condition such as rheumatoid arthritis is contributing to the pain.

These medicines can be taken by mouth, and some are also available as gels, creams, or patches for local pain relief. Topical NSAIDs may be useful for pain in a specific area, such as a hand or knee, because they can deliver medicine to the affected area with less exposure to the whole body. Even so, they can still cause side effects, so use them carefully.

• For headaches, muscle pain, and minor injuries: short-term symptom relief may be appropriate.
• For arthritis or inflammatory pain: a doctor may recommend an NSAID as part of a broader treatment plan.
• For fever: NSAIDs can help lower temperature, but they do not replace evaluation when symptoms are severe or persistent.

Benefits, Limits, and Why 'Over-the-Counter' Does Not Always Mean Risk-Free

One reason NSAIDs are widely used is that they can work well for both pain and inflammation. This makes them different from some other pain relievers that reduce pain or fever but have little anti-inflammatory effect. For example, in a swollen ankle, inflamed joint, or painful menstrual cramps, NSAIDs may offer more targeted relief than medicines that do not address inflammation.

That said, they have limits. NSAIDs can reduce symptoms, but they do not correct every underlying problem. Severe abdominal pain, chest pain, ongoing joint swelling, repeated fevers, or unexplained pain should not be treated only with self-medication. Persistent symptoms may point to a condition that needs proper diagnosis.

Because many NSAIDs are sold without a prescription, some people assume they are harmless. In reality, the same properties that make them effective can also create risks, especially with frequent use, high doses, or use in someone with kidney disease, a history of ulcers, heart disease, or certain medicine interactions. Reading labels carefully and avoiding duplicate products are simple but important steps.

Side Effects, Risks, and Medicine Interactions

The most common side effects of NSAIDs involve the digestive system. They may cause stomach upset, heartburn, nausea, or indigestion. In some people, especially with longer use or higher doses, they can contribute to stomach ulcers or bleeding. Risk is higher in older adults, people with a past ulcer, those who drink alcohol heavily, and those taking steroids or blood thinners.

NSAIDs can also affect kidney function by reducing blood flow to the kidneys. This is especially important in people who already have kidney disease, dehydration, heart failure, or high blood pressure, or who take certain medicines such as diuretics, ACE inhibitors, or ARBs. In some cases, NSAIDs may worsen fluid retention or raise blood pressure.

Some NSAIDs may increase the risk of heart attack, stroke, or worsening heart failure, particularly with prolonged use or in people who already have cardiovascular disease. They can also interact with blood thinners and antiplatelet medicines, increasing bleeding risk. Anyone with existing high blood pressure or a history of heart or kidney problems should speak with a doctor before regular use.

• Possible digestive risks: irritation, ulcers, bleeding
• Possible kidney risks: reduced kidney function, fluid imbalance
• Possible cardiovascular risks: raised blood pressure, fluid retention, increased risk in some patients
• Possible interactions: blood thinners, steroids, some blood pressure medicines, certain antidepressants, and other NSAIDs

Who Should Be Especially Cautious With NSAIDs

Extra caution is needed for certain groups. Older adults are generally more vulnerable to side effects, particularly stomach bleeding and kidney problems. People with a history of peptic ulcer disease, gastrointestinal bleeding, chronic kidney disease, heart disease, liver disease, or asthma triggered by pain medicines should not start regular NSAID use without medical advice.

Pregnancy is another important situation. Some NSAIDs may not be recommended, especially later in pregnancy, because they can affect the baby and the pregnancy in specific ways. People who are pregnant, trying to conceive, or breastfeeding should ask a qualified clinician which pain-relief options are safest for them.

Children should only receive NSAIDs in age-appropriate forms and doses recommended by a healthcare professional or clearly stated on approved labeling. For people with ongoing musculoskeletal or joint pain, treatment may also involve non-drug approaches or specialist evaluation, and in selected cases a doctor may discuss options such as orthopedic assessment if symptoms are related to injury or joint disease.

How Doctors Assess Safe Use and Alternatives

When NSAIDs are being considered for repeated or long-term use, doctors look at more than the pain itself. They may ask about stomach ulcers, reflux, kidney disease, blood pressure, heart disease, asthma, pregnancy, and all current medicines. In some cases, blood tests may be needed to check kidney function or other health factors before continuing treatment.

If NSAIDs are not the best choice, alternatives may be available depending on the cause of the pain. These can include rest, ice or heat, physiotherapy, exercise programs, topical treatments, or other pain-relief medicines. If there is concern about inflammation, structural injury, or another underlying problem, more detailed evaluation may be needed, such as physical therapy and rehabilitation or specialist review.

For patients with persistent pain linked to the digestive system, joints, or another organ system, the safest next step is often diagnosis rather than simply changing medicines. Treatment decisions are individualized, and the goal is to balance symptom relief with overall safety.

Practical Tips for Safer Use and Self-Care

For people who are advised that an NSAID is appropriate, safer use usually means taking the lowest effective dose for the shortest time needed. And don’t take more than one NSAID at the same time unless your doctor specifically tells you to. Many cold, flu, and pain products contain NSAIDs, so checking labels can help prevent accidental double-dosing.

Taking NSAIDs with food may help reduce stomach irritation for some people, but it does not fully prevent ulcers or bleeding. Staying well hydrated may also be helpful, especially during illness or hot weather, although hydration does not remove kidney risk in higher-risk individuals. Alcohol can add to stomach irritation and bleeding risk, so moderation is sensible.

Self-care should also include paying attention to what the pain may be signaling. Recurrent joint pain, swelling, or reduced movement may need assessment for conditions affecting the bones, joints, or soft tissues. In some patients, advanced management may involve specialist services such as rheumatology care or another targeted treatment plan based on the diagnosis.

Near the end of the care pathway, some patients may seek coordinated international evaluation. Acıbadem Health Point’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat a wide range of pain, inflammatory, and musculoskeletal conditions for international patients.

When to Seek Medical Care

See a doctor if your pain is severe, keeps coming back, lasts longer than expected, or gets in the way of daily life. A person should also contact a doctor before using NSAIDs regularly if they have kidney disease, a history of ulcers, heart disease, high blood pressure, are pregnant, or take prescription medicines such as blood thinners.

Urgent medical care is needed if warning signs appear after taking an NSAID. These include vomiting blood, black or tarry stools, severe stomach pain, chest pain, sudden shortness of breath, sudden weakness on one side, fainting, markedly reduced urination, facial swelling, or signs of a serious allergic reaction. These symptoms do not always mean an NSAID is the cause, but they should be assessed promptly.

One more thing: if a fever or pain seems to be hiding an infection or another acute illness, get checked. Medicine can ease symptoms, but it shouldn’t delay a diagnosis when your body is sending clear warning signs.

Frequently asked questions