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Peptide & Experimental

DMSO (dimethyl sulfoxide)

Organic solvent; approved in the US only as a bladder instillation for interstitial cystitis · Dimethyl sulfoxide, Rimso-50

DMSO is a solvent with an unusual property: it penetrates the skin rapidly and carries dissolved substances with it. In the US, it has been approved since 1978 as a bladder instillation for interstitial cystitis; for complex regional pain syndrome there are small positive trials. For the miracle-cure effect promoted on social media, especially when drunk, controlled data are lacking.

What DMSO is

Dimethyl sulfoxide is a clear, almost odorless liquid that mixes with water and most organic solvents. It is used in laboratories and in drug manufacturing, and in medicine as a bladder instillation, as a carrier for active ingredients on the skin and as an additive when freezing stem cells. It has been used in humans since the 1960s.

It is related to MSM: the body breaks DMSO down into MSM, among other things. MSM is swallowed as a powder; DMSO is a solvent that is usually applied to the skin.

How it works

Its role as a solvent and carrier is best understood: DMSO penetrates the skin and mucous membranes and carries active ingredients dissolved in it along. Beyond that, an effect as a free-radical scavenger, a release of histamine and vasodilation have been described. How much of this reaches humans with pain has hardly been measured directly.

Breakdown products cause a garlic taste and an odor on the breath and skin, which, according to the US prescribing information, can last up to 72 hours.

What is well supported

  • An approved medicine. As a 50 percent solution for bladder instillation, DMSO has been approved in the US since 1978 for the relief of symptoms in interstitial cystitis. A 2026 review calls this the use with the clearest clinical support, especially in the Hunner form.
  • Complex regional pain syndrome. In a double-blind trial with 32 patients, a cream with 50 percent DMSO worked better over 2 months than the same cream without DMSO. In a second trial with 146 patients, it was overall as effective as N-acetylcysteine.
  • A proven carrier. Diclofenac in a DMSO-containing solution relieved knee osteoarthritis pain over 12 weeks better than placebo and about as well as diclofenac tablets.
  • Plenty of experience with adverse effects. A systematic review analyzed 109 studies; the most common reactions were transient.

What the studies show

Complex regional pain syndrome: two controlled trials

Zuurmond 1996 treated 32 patients with acute complex regional pain syndrome (formerly reflex sympathetic dystrophy) after accidents for 2 months with a fatty cream with or without 50 percent DMSO, plus physiotherapy. Both groups improved, the DMSO group considerably more (p < 0.01). Perez 2003 compared DMSO cream with N-acetylcysteine tablets in 146 patients, double-blinded. After 17 and 52 weeks, both were equally effective overall; in the warm form DMSO did better, in the cold form N-acetylcysteine. This trial had no placebo group.

Knee osteoarthritis: the carrier alone did not work

Simon 2009 divided 775 people with knee osteoarthritis into five groups, including diclofenac in DMSO solution, the DMSO solution without active ingredient and placebo. Diclofenac in DMSO was superior to placebo and to the plain DMSO solution. The DMSO solution alone was no more effective than placebo. The most common adverse effect of the diclofenac solution was dry skin in 18.2 percent.

Older osteoarthritis trials

A 2008 systematic review found four DMSO trials on knee osteoarthritis, two of them with less pain than under the comparison treatment. The authors rate all DMSO trials as methodologically weak, among other things because of possible unblinding and questionable treatment duration, and draw no firm conclusion.

Where the data stop

  • Drinking DMSO. There are no controlled trials testing oral intake against pain, infections or other diseases.
  • Effect of its own in joint pain. In the largest trial, the DMSO solution alone was no more effective than placebo.
  • Skin ulcers in scleroderma. According to a 2026 review, no benefit, but marked skin irritation.
  • Brain injuries and cancer. Here there are only small uncontrolled case series and historical reports; proof of efficacy is lacking.

Status, approval and legal

In the US, DMSO has been approved as Rimso-50 since 1978 for bladder instillation in interstitial cystitis. The prescribing information states explicitly that it is not recognized as safe and effective for any other use.

In Germany, DMSO is sold freely as a solvent. If it is offered with a healing effect, it may be considered a medicine under § 2 of the German Medicinal Products Act (Arzneimittelgesetz). DMSO is not approved for oral use. For unapproved uses, this text gives no amounts or methods of use.

Safety

A systematic review of 109 studies found mainly gastrointestinal and skin reactions, mostly transient and not requiring treatment; the higher the amount, the more frequent. The US prescribing information lists garlic taste and odor, histamine release with occasional hypersensitivity reactions and lens opacities in animals after high long-term doses; for bladder instillation, it recommends regular eye, liver, kidney and blood checks. DMSO can enhance the effect of medicines used at the same time.

Because DMSO carries dissolved substances through the skin, impurities also enter the body more easily. In Germany, a patient developed toxic contact dermatitis after applying it undiluted under occlusion; the authors advise against applying it. As an additive in frozen stem cell preparations, DMSO can trigger infusion reactions. In the BK-Score, safety stands at 5 out of 10; this axis measures how well safety has been studied, not how safe the substance is. This text is information and does not replace medical advice.

BK-Score Thin human evidence

Human evidence4
Mechanism5
Safety data5
Hype gap2
Track record of use7

Evidence 4, because there are only a few small controlled trials: a positive trial with 32 patients in complex regional pain syndrome (Zuurmond 1996), a tie with N-acetylcysteine in 146 patients (Perez 2003) and methodologically weak osteoarthritis trials (Brien 2008); in the largest trial with 775 participants, the DMSO solution alone was no more effective than placebo (Simon 2009), and there are no controlled data on oral use. Mechanism 5, because its function as a solvent and carrier is well understood, but its own anti-inflammatory effect has hardly been measured in humans. Safety 5, because a systematic review of 109 studies found mainly transient gastrointestinal and skin reactions (Kollerup Madsen 2018) and the US prescribing information describes the risks of bladder instillation, but self-application at high concentrations and drinking have not been studied (Blomen 2024). Hype 2, because DMSO is promoted on social media as a miracle cure for pain and many diseases, but only the bladder instillation and its role as a carrier are established. Use 7, because DMSO has been used in medicine since the 1960s, as a bladder instillation, carrier and additive when freezing stem cells. Direction mixed: established benefit in interstitial cystitis and small positive trials in the pain syndrome, no effect of its own in osteoarthritis in the largest trial.

The score rates the state of knowledge, not the substance. “Safety data 9” means well studied – not harmless. “Track record of use 9” means used long and widely – that is not proof of efficacy.
Subjective assessment by Biohacking Kompakt based on published scoring rules – not a scientific rating and not a medical recommendation. Rules and all ratings (German)

Frequently asked questions about DMSO

What is DMSO?

DMSO, dimethyl sulfoxide, is a solvent that penetrates the skin rapidly and carries dissolved substances with it. In medicine, it serves as a bladder instillation, as a carrier for active ingredients on the skin and as an additive when freezing stem cells. In the body, it is broken down into MSM, among other things.

What is DMSO approved for?

In the US, DMSO has been approved since 1978 as a 50 percent solution for bladder instillation in interstitial cystitis. The prescribing information stresses that it is not recognized as safe and effective for any other use. DMSO is not approved for oral use.

Does DMSO help with joint pain?

In the largest trial with 775 people with knee osteoarthritis, the DMSO solution alone was no more effective than placebo; what worked was diclofenac dissolved in DMSO. Older osteoarthritis trials with DMSO are considered methodologically weak. In complex regional pain syndrome, there are small positive trials with a DMSO cream.

Has drinking DMSO been studied?

No. There are no controlled trials testing oral intake of DMSO against pain, infections or other diseases. The review on adverse effects found gastrointestinal complaints among the most common reactions. DMSO is not approved for oral use.

What is the difference between DMSO and MSM?

MSM is a breakdown product of DMSO. DMSO is a solvent that is usually applied to the skin and carries other substances through it. MSM is an odorless powder that is swallowed as a food supplement.

What side effects does DMSO have?

The most common are gastrointestinal and skin reactions, plus a garlic odor on the breath and skin. Toxic contact dermatitis has been described after undiluted application. DMSO can enhance the effect of other medicines and carry impurities through the skin. This information does not replace medical advice.

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Information only, not medical advice and not a usage or dosage recommendation. Prescription-only and unapproved substances belong in the hands of a physician. Last updated: 2026-11-07.