Naproxen 500 mg is a prescription-strength dose and one of the more effective over-the-counter-class painkillers for toothache. It falls into the category of NSAIDs (nonsteroidal anti-inflammatory drugs), which the American Dental Association recommends as first-line therapy for acute dental pain, rating them more effective than even opioid painkillers for this specific type of pain.
That said, “strong” is relative. At 500 mg, you’re taking more than double the standard over-the-counter single dose (220 mg of naproxen sodium, sold as Aleve). It’s a meaningful step up in pain relief, but it won’t eliminate severe toothache pain from an abscess or deep infection on its own. Here’s what to realistically expect.
Why NSAIDs Work Well for Tooth Pain
Toothache pain is heavily driven by inflammation. When tissue in or around a tooth is damaged or infected, your body produces chemicals called prostaglandins that sensitize nearby nerves and amplify pain signals. Naproxen is a potent blocker of prostaglandin production, which means it attacks the root cause of dental pain rather than just masking the sensation. This is why NSAIDs consistently outperform opioids for dental pain in clinical studies: opioids dull your brain’s perception of pain, but they don’t reduce the inflammation that’s generating the pain in the first place.
How 500 mg Compares to Other Doses
The over-the-counter version of naproxen sodium (Aleve) comes in 220 mg tablets, with a typical single dose of one or two tablets. A 500 mg prescription tablet delivers roughly the same amount of active naproxen as two OTC tablets taken together (440 mg of naproxen sodium is equivalent to about 500 mg of naproxen base). So if you’ve been prescribed 500 mg, you’re at the upper end of a single dose but not at an unusual or dangerous level.
The maximum daily limit for prescription naproxen is typically 1,500 mg, taken as two or three doses spread through the day. A common regimen is 500 mg twice daily, morning and evening. Staying within these limits matters because naproxen, like all NSAIDs, can irritate the stomach lining and affect kidney function at high or prolonged doses.
How Long Relief Lasts
One of naproxen’s biggest advantages over ibuprofen for toothache is duration. A randomized, double-blind clinical trial comparing naproxen sodium to ibuprofen after dental surgery found that naproxen provided a longer analgesic effect than ibuprofen at standard doses. This makes practical sense: naproxen has a half-life of roughly 12 to 17 hours, while ibuprofen’s is around 4 to 6 hours. You can expect a 500 mg dose of naproxen to provide meaningful relief for 8 to 12 hours, compared to 4 to 6 hours for a standard dose of ibuprofen.
That longer duration is especially useful at night, when toothache pain tends to feel worse. A single dose before bed can often carry you through to morning without waking up in pain, something ibuprofen frequently can’t do.
Naproxen typically begins working within 30 to 60 minutes, though the sodium form (which dissolves faster) may kick in slightly sooner. Taking it with food or milk can help prevent nausea but may slow absorption slightly.
When 500 mg Won’t Be Enough
Naproxen 500 mg handles mild to moderate toothache well. It’s effective for pain from cavities, gum inflammation, a cracked tooth, or the throbbing ache after a dental procedure. But there are situations where it won’t provide adequate relief on its own:
- Dental abscess: If infection has formed a pocket of pus around the tooth root, the pressure and bacterial load create pain that anti-inflammatories can only partially control. You’ll need antibiotics and likely drainage.
- Exposed nerve: When decay reaches the pulp (the innermost part of the tooth containing the nerve), the resulting pain can be intense and constant. Naproxen will take the edge off, but definitive treatment like a root canal is the only real fix.
- Severe post-surgical pain: After a complex extraction or surgical procedure, your dentist may recommend combining naproxen with acetaminophen (Tylenol) for stronger coverage. These two drugs work through completely different pathways, so taking them together provides additive relief without doubling down on the same side effects.
The ADA’s 2024 clinical practice guideline specifically endorses combining an NSAID with acetaminophen as a strategy for managing dental pain that doesn’t respond well to either drug alone. This combination is now preferred over prescribing opioids in most cases.
How It Stacks Up Against Ibuprofen
Ibuprofen (Advil, Motrin) is the other NSAID commonly used for toothache, and both are effective. The main differences are practical rather than dramatic:
- Duration: Naproxen lasts roughly twice as long per dose, meaning fewer pills per day and better overnight coverage.
- Speed of onset: Ibuprofen tends to kick in slightly faster, which can matter when you’re in acute pain and want immediate relief.
- Dosing frequency: Naproxen is typically taken every 8 to 12 hours. Ibuprofen needs to be taken every 4 to 6 hours to maintain relief.
- Stomach effects: Both can cause GI irritation, but naproxen’s longer presence in the body means it sits on the stomach lining longer. Taking it with food helps.
For short-term toothache management (a few days while waiting for a dental appointment), both are reasonable choices. Naproxen’s convenience of fewer doses per day gives it a practical edge.
Making It Work Best for Toothache
Take naproxen with food or a glass of milk to reduce the chance of stomach upset. If your toothache involves visible swelling or you suspect infection, naproxen will help with the pain and inflammation but won’t treat the underlying cause. Anti-inflammatories are a bridge, not a cure, for dental problems.
If a single 500 mg dose isn’t cutting it, adding 500 mg of acetaminophen between naproxen doses is a well-supported strategy. Because they work through different mechanisms, you get broader pain coverage. Do not, however, combine naproxen with other NSAIDs like ibuprofen or aspirin, as they share the same mechanism and stacking them increases the risk of stomach bleeding without meaningfully improving pain relief.
Avoid naproxen if you have a history of stomach ulcers, kidney disease, or are taking blood thinners. It can also interact with certain blood pressure medications. If you’re pregnant, NSAIDs are generally avoided, particularly after 20 weeks.