DMSO cream is used off-label in the United States primarily for osteoarthritis and musculoskeletal pain, though the FDA has only approved a 50% DMSO bladder wash for interstitial cystitis, and evidence backing topical use is thin.
If you’ve been shopping for arthritis relief online, you’ve probably seen DMSO cream listed as a natural painkiller. The story behind it is more complicated than most sellers admit. Dimethyl sulfoxide is a solvent byproduct of paper manufacturing, and it hit the 1960s alternative-medicine scene with claims of curing everything from bruises to cancer. More than fifty years later, the real list of what this topical cream actually treats is much shorter — and for several popular uses, the science says it doesn’t outperform a placebo. This guide covers the FDA’s official stance, the off-label uses with and without evidence, and the safety facts you need before buying.
What DMSO Cream Is — and What the FDA Actually Approved
DMSO is a clear liquid derived from wood pulp. It penetrates human skin easily, which made it an early candidate for delivering drugs through the skin. The FDA approved a 50% concentration of dimethyl sulfoxide in 1978 — but only as an intravesical bladder wash (instilled through a catheter into the bladder) for interstitial cystitis, a chronic bladder condition. The brand name is RIMSO-50, and a generic version was approved in 2002.
That single approval is all the FDA has ever granted. No topical DMSO cream is FDA-approved for any condition in the United States. Every jar of cream you can buy online is sold for off-label use, which is legal to market but carries no FDA verification of safety or effectiveness.
Off-Label Uses That Do Have Some Evidence
Acute tendopathies. A multicenter placebo-controlled study using 10% DMSO gel found significant improvement in pain and joint mobility for acute tendon injuries such as lateral epicondylitis (tennis elbow) compared to placebo.
Musculoskeletal injury pain. Some patients report real pain reduction after topical DMSO. Health Canada acknowledges the substance may help reduce pain from musculoskeletal injuries, though it notes DMSO has not been shown to have actual anti-inflammatory benefits.
Off-label use for shingles (herpes zoster). DMSO cream has been applied to reduce pain from shingles outbreaks, though the evidence is less robust than for tendon injuries.
Uses Without Scientific Support (and deceptions to watch for)
Osteoarthritis. This is the most common reason people buy DMSO cream. A 2017 analysis of studies found DMSO no more effective than placebo for osteoarthritis pain. If you have arthritic knees and are looking for options, our roundup of the best DMSO creams compares the top brands honestly, but the evidence says it likely won’t change your pain score.
Cancer treatment. The American Cancer Society states flatly that there is no evidence DMSO treats cancer in humans. Using it as an alternative to standard care can delay effective treatment with serious consequences.
Pressure ulcer prevention. A randomized study testing 5% DMSO cream for preventing bedsores found no benefit on the buttocks and increased superficial pressure ulcers on the heel. Do not apply it to vulnerable areas without a doctor’s guidance.
| Condition / Use | Best Evidence Level | Bottom Line |
|---|---|---|
| Interstitial cystitis (via bladder wash) | FDA-approved | Works — 50% solution, prescription-only, catheter-administered |
| Acute tendopathy (tennis elbow, etc.) | Positive controlled study | 10% gel may reduce pain and improve mobility short term |
| Musculoskeletal injury pain | Limited, mainly patient report | Pain reduction possible, anti-inflammatory effect unproven |
| Shingles (herpes zoster) | Low — case series / anecdotal | Some relief reported, no large trials |
| Osteoarthritis | Not better than placebo (2017 meta-analysis) | Likely won’t help — save your money |
| Cancer treatment | No evidence (ACS statement) | Dangerous distraction from real treatment |
| Bedsores / pressure ulcer prevention | Negative study result | May cause harm at the heel — do not use |
How DMSO Cream Works (and Why That’s Also the Risk)
DMSO absorbs through skin within minutes. That penetration ability is its signature trait — and its danger. Because DMSO carries whatever is on your skin deeper into your body, applying it over lotions, residues, or even some prescription topicals can cause unexpected drug interactions. Always wash the application site with soap and water first and rinse thoroughly.
At high concentrations, DMSO can cause a severe (occasionally deadly) allergic-type reaction. Stick to the 10% or lower concentrations found in off-label creams, and never use industrial-grade DMSO.
Pregnant and breastfeeding women should not use DMSO because effects on the fetus or infant are unknown.
DMSO Cream Dosage: There Isn’t an Approved One
Because the FDA has never approved a topical DMSO product, there is no official dosage for cream or gel. The only established protocol is for the bladder instillation: 50 mL of 50% DMSO, retained for 15 minutes, repeated every two weeks. That is not a recipe for a tube of cream you bought online.
If your doctor prescribes topical DMSO off-label, follow their specific instructions. If you are buying a cream marketed for arthritis without a prescription, the typical advice is to apply a thin layer to clean skin over the painful joint once or twice daily and to stop if irritation develops. But that advice is user folklore, not medical guidance.
| Route | Concentration | Official Status |
|---|---|---|
| Bladder instillation (catheter) | 50% | FDA-approved — prescription only |
| Topical cream (off-label) | 5% – 10% | No FDA approval, no standard dosage |
| Industrial / veterinary DMSO | 99%+ | Never use topically — dangerous |
DMSO Cream Side Effects You Should Know
The most famous side effect is completely harmless: a strong garlicky or oyster-like taste in your mouth within minutes of applying the cream. That is the DMSO traveling through your bloodstream. Other common effects include skin irritation, redness, stinging at the application site, and a mild rash.
More serious but rare: some studies note eye toxicity even at low doses, though the research is inconsistent. If you have a history of eye problems, discuss any DMSO use with your doctor first.
FAQs
Can you buy DMSO cream over the counter?
Yes, DMSO creams and gels are sold without a prescription online and in some health food stores in the United States. They are marketed as dietary supplements or topical pain relievers, which means they bypass FDA pre-market safety review. The only FDA-approved DMSO product (RIMSO-50) is a prescription-only bladder solution.
Does DMSO cream really help arthritis pain?
A 2017 meta-analysis found DMSO cream no more effective than placebo for osteoarthritis pain. Some individuals report modest relief from musculoskeletal pain, but the best controlled studies suggest the effect is not statistically significant for arthritis specifically. For acute tendon injuries, a 10% gel showed real benefit in one multicenter trial.
What makes DMSO different from other anti-inflammatory creams?
DMSO penetrates skin far faster than typical pain-relief creams, which means any medicine, toxin, or chemical on your skin will also be absorbed more deeply. It also has a unique side effect — a strong garlic taste that appears minutes after application. Health Canada notes DMSO has not been shown to have anti-inflammatory benefits itself.
Is DMSO cream safe to use daily?
Long-term daily safety studies for topical DMSO are lacking. Short-term use under medical supervision is reasonable for some conditions (acute tendopathy, certain musculoskeletal injuries). Daily application for months without a doctor’s input is not supported by evidence and carries unknown risks. Stop use if skin irritation, blistering, or burning develops.
What happens if you put too much DMSO on your skin?
High concentrations (above 10%) or large areas of coverage increase absorption, which can cause skin burns, allergic-type reactions, and in rare published cases, a potentially deadly reaction. If you accidentally apply too much, wash the area immediately with soap and water and seek medical attention if you experience difficulty breathing, hives, or swelling of the face or throat.
References & Sources
- Healthline. “What Is DMSO? Uses, Risks, and Benefits.” Comprehensive overview of DMSO uses and FDA approval status.
- WebMD. “DMSO — Uses, Side Effects, and More.” Safety warnings, drug interaction risks, and off-label use analysis.
- Mayo Clinic. “Dimethyl Sulfoxide (Intravesical Route) — Description and Brand Names.” Official FDA-approved instillation protocol.
- Consensus. “DMSO: Is It a Potential Treatment? Uses and Risks.” Research synthesis covering tendopathy studies, osteoarthritis meta-analysis, and safety data.
- McGill Office for Science and Society. “DMSO: Not a Cure-All — the FDA’s ‘Panic’ Over It Birthed a Myth.” Historical context and eye toxicity evidence.