For most people with tendonitis, an oral NSAID like ibuprofen or naproxen is the most effective over-the-counter pain reliever. These medications reduce both pain and inflammation, which gives them a clear edge over acetaminophen (Tylenol), which only addresses pain. But the best choice depends on where your tendon pain is, how long you’ve had it, and your overall health.
Why NSAIDs Work Better Than Acetaminophen
Tendonitis involves inflamed or irritated tendon tissue, so a medication that targets inflammation will do more than one that simply dulls the pain signal. In a head-to-head study of patients with rotator cuff shoulder pain, those taking ibuprofen for six weeks saw significant improvements in both pain severity and functional ability. The ibuprofen group’s pain scores dropped by about 19 points on a 100-point scale, and their disability scores improved by over 17 points. The acetaminophen group did not reach significant improvement on either measure.
That said, acetaminophen wasn’t useless. Patients taking it reported better scores in perceived physical health and overall quality of life, improving by about 9 points in those domains. This suggests acetaminophen can still play a supporting role, especially if you can’t tolerate NSAIDs. But if your goal is reducing the pain itself and getting back to normal movement, ibuprofen or naproxen is the stronger option.
The two most common over-the-counter NSAIDs for tendonitis are ibuprofen (Advil, Motrin) and naproxen (Aleve). The practical difference: naproxen lasts longer per dose (about 12 hours versus 4 to 6 for ibuprofen), so you take it less frequently. Both are effective, and the choice often comes down to which one agrees better with your stomach.
Topical NSAIDs for Shallow Tendons
If your tendonitis is in a spot close to the skin surface, like the wrist, elbow, knee, or Achilles tendon, a topical NSAID gel or patch can deliver medication directly to the area while keeping much less of the drug circulating through your body. This matters because the most common side effects of oral NSAIDs (stomach irritation, kidney strain) come from systemic absorption. Topical formulations significantly reduce that exposure.
Diclofenac gel, available over the counter as Voltaren, is the most widely used topical NSAID. In clinical studies, both diclofenac gel and diclofenac patches provided significantly better pain relief than placebo. Patches showed the strongest short-term effect in the first one to two weeks, likely because they deliver the drug more steadily through sustained contact with the skin. For longer use beyond a few weeks, gel and liquid solution formulations both remained effective, with the solution showing slightly more consistent results due to better absorption.
Topical NSAIDs are a particularly good first choice if you’re older, have a sensitive stomach, or take other medications that interact poorly with oral NSAIDs.
NSAIDs and Tendon Healing: A Trade-Off
Here’s something most people don’t realize: NSAIDs help with tendonitis pain but may interfere with the healing process in certain situations. The relationship is complicated. In lab studies, NSAIDs actually increased collagen production in tendon cells, which sounds beneficial. But they also reduced tendon cell proliferation and migration, both of which are necessary for repair after injury.
The most striking finding comes from a study of healthy runners. Those given an NSAID before running a marathon showed a complete blunting of the normal collagen synthesis response in their patellar tendons compared to runners given a placebo. The drug suppressed a key inflammatory molecule that triggers collagen production during weight-bearing activity. In other words, the same mechanism that reduces your pain also turns down your body’s repair signal.
This doesn’t mean you should avoid NSAIDs entirely. For acute flare-ups, a short course of a few days to two weeks can bring inflammation under control and let you start moving the tendon again, which itself promotes healing. The concern is more about prolonged, daily use over weeks or months, which could slow tissue recovery. If your tendonitis has lingered for more than a couple of weeks, talk with your provider about whether continued NSAID use is helping or just masking the problem.
When Cortisone Injections Enter the Picture
If oral and topical pain relievers aren’t cutting it, corticosteroid injections are sometimes offered. These deliver a powerful anti-inflammatory directly into the tissue around the tendon. For conditions like trigger finger, where chronic inflammation is clearly present, injections have solid evidence behind them.
For other types of tendonitis, the picture is less straightforward. Corticosteroids can inhibit the formation of new connective tissue, reduce tendon mass, and decrease the amount of load a tendon can handle before it fails. Case reports of tendon rupture after injection are common enough that injections near the Achilles tendon or patellar tendon are often discouraged, especially if there’s already a partial tear. These are heavily loaded tendons, and weakening them further carries real risk.
Injections are generally reserved for cases that haven’t responded to several weeks of other treatment, and most providers limit the number of injections to a given area to avoid cumulative tendon damage.
Who Should Avoid Oral NSAIDs
Oral NSAIDs are effective, but they’re not safe for everyone. The highest risk of serious gastrointestinal side effects, including stomach ulcers and bleeding, falls on people over 65, those with a history of peptic ulcer disease, and anyone taking blood thinners, corticosteroids, or antiplatelet medications. Using NSAIDs at high doses or for extended periods compounds that risk further.
People with kidney disease also need to be cautious, since NSAIDs reduce blood flow to the kidneys and can worsen function. If you fall into any of these categories, topical NSAIDs or acetaminophen are safer starting points. For people on blood thinners or with ulcer history who still need oral anti-inflammatory relief, a provider can add a stomach-protective medication to reduce the risk.
Supporting Pain Relief Without Medication
No pain reliever works as well in isolation as it does paired with basic tissue management. The RICE approach (rest, ice, compression, elevation) remains a first-line strategy for acute tendonitis flare-ups. Ice constricts blood vessels and numbs the tissue, providing short-term pain relief in 10-minute intervals. Rest doesn’t mean total immobilization, which can actually stiffen the tendon, but rather avoiding the specific activity that triggered the pain.
Once the acute phase settles, gentle eccentric exercises (slowly loading the tendon in a lengthened position) are one of the most effective long-term treatments for tendonitis. These exercises stimulate collagen remodeling and gradually increase the tendon’s load tolerance. Pain medication during this phase can help you move through the exercises with enough comfort to make progress, which is why combining the two approaches often works better than either alone.
Supplements With Some Evidence
A few natural anti-inflammatory supplements have clinical data behind them, though the evidence is weaker than for NSAIDs. SAM-e, a compound the body naturally produces, has been studied for joint pain and is sometimes used for tendonitis symptoms at doses of 600 to 1,200 mg daily split into three doses. Multiple clinical trials have shown it improves joint health in osteoarthritis, though tendonitis-specific data is limited.
Boswellia, an herbal extract, reduced osteoarthritis pain by nearly 20 points on a 100-point scale in a three-month trial at 100 mg daily of an enriched formulation, with no serious side effects. These supplements are unlikely to match the immediate relief of an NSAID, but they may offer a gentler option for people who need long-term anti-inflammatory support without the gastrointestinal risks.