Ibuprofen is the better choice for sunburn. Sunburn is fundamentally an inflammatory reaction in your skin, and ibuprofen targets inflammation directly while Tylenol (acetaminophen) does not. Both drugs can reduce pain, but only ibuprofen addresses the redness, swelling, and heat that make sunburn so uncomfortable.
Why Ibuprofen Works Better on Sunburn
The difference comes down to where each drug acts in your body. Ibuprofen is an NSAID (nonsteroidal anti-inflammatory drug) that blocks enzymes called COX-1 and COX-2 throughout the body, including in your skin. These enzymes produce prostaglandins, chemicals that drive inflammation, pain, and fever. By shutting down prostaglandin production right at the site of the burn, ibuprofen reduces redness, swelling, and pain all at once.
Acetaminophen blocks some of those same enzymes, but only in the central nervous system. It can dull the pain signals reaching your brain, so you feel less discomfort. It does nothing, however, to calm the inflammatory process happening in the skin itself. Your burn will still look just as red and feel just as hot and tight. For a condition driven almost entirely by inflammation, that’s a significant limitation.
Timing Matters More Than You’d Expect
Ibuprofen is most effective when you take it early. Clinical studies have found that NSAIDs work best when started immediately after UV exposure, showing the strongest effect around six hours post-exposure, before redness reaches its peak intensity. If you realize you got too much sun while you’re still at the beach or shortly after coming inside, that’s the ideal window to take your first dose.
Once a sunburn has fully developed, typically 12 to 24 hours after exposure, ibuprofen’s ability to reduce the inflammatory cascade is more limited. It will still help with pain, but the window for meaningfully blunting the redness and swelling has narrowed. In one controlled study, patients who took 400 mg of ibuprofen every four hours starting at the time of UV exposure saw a significant reduction in redness compared to placebo, though other symptoms like itching, skin pain, and general discomfort didn’t show statistically significant improvement.
The takeaway: don’t wait until bedtime to pop a pill. Start ibuprofen as soon as you suspect you’ve been burned.
How to Dose Ibuprofen for Sunburn
For adults and teenagers, the standard dose for mild to moderate pain is 400 mg every four to six hours as needed. Most over-the-counter ibuprofen tablets are 200 mg, so that’s two tablets per dose. Don’t exceed 1,200 mg in 24 hours unless directed otherwise by a healthcare provider, and take it with food to reduce the chance of stomach irritation.
Plan to keep taking it consistently for at least the first 48 hours. Sunburn inflammation peaks between 24 and 72 hours after exposure, so a single dose won’t carry you through. Staying ahead of the pain with regular dosing is more effective than chasing it after it flares up.
When Acetaminophen Still Makes Sense
Ibuprofen isn’t an option for everyone. If you have stomach ulcers, kidney problems, or are taking blood thinners, acetaminophen is the safer alternative. It won’t reduce the inflammation, but it will take the edge off the pain and help you sleep. Some people also find that ibuprofen upsets their stomach, especially when taken on an empty stomach during a day when they’ve been dehydrated from sun exposure.
If you go with acetaminophen, the maximum safe dose for adults is 4,000 mg in 24 hours. That ceiling matters because acetaminophen is in dozens of combination products (cold medicines, sleep aids, some prescription painkillers), and it’s easy to exceed the limit without realizing it. Liver damage from acetaminophen overdose is a real and common problem.
Sunburn Relief for Children
For kids with sunburn, ibuprofen is also the preferred pain reliever. Seattle Children’s Hospital recommends starting ibuprofen as soon as possible, ideally within six hours of sun exposure, and continuing it every six to eight hours for two days. Starting early can significantly limit both pain and swelling.
One important age restriction: ibuprofen is not approved for infants under six months old. For babies that young, acetaminophen is the only over-the-counter option for pain, though infants under six months should be kept out of direct sun entirely. Children between six months and three years are best protected with shade and sun-protective clothing rather than relying on sunscreen alone.
What Else Helps Alongside Medication
Ibuprofen handles the internal inflammatory response, but your skin needs direct care too. Cool (not cold) compresses or a lukewarm bath can draw heat out of the skin and provide immediate comfort. Apply a fragrance-free moisturizer or pure aloe vera gel while the skin is still slightly damp to lock in moisture. Sunburned skin loses water rapidly, which is why it feels so tight and eventually peels.
Drink extra fluids. Sunburn pulls fluid toward the skin surface and away from the rest of your body, which compounds any dehydration you already have from being out in the heat. Loose, soft clothing made from natural fibers will irritate the burn less than synthetics. Avoid anything with benzocaine or lidocaine, as these topical anesthetics can actually irritate burned skin further in some people.
For severe sunburn with blistering, fever, chills, or nausea, over-the-counter treatment alone may not be enough. Those symptoms suggest a deeper burn or significant systemic inflammation that could benefit from medical evaluation.