DMSO (Dimethyl Sulfoxide) - Effects and Uses
DMSO (dimethyl sulfoxide) is an organic sulfur compound with anti-inflammatory and analgesic properties, widely used in medicine and biomedical research.
Things worth knowing about "DMSO"
DMSO (dimethyl sulfoxide) is an organic sulfur compound with anti-inflammatory and analgesic properties, widely used in medicine and biomedical research.
What is DMSO?
DMSO (dimethyl sulfoxide) is a colorless organic sulfur compound with the chemical formula (CH₃)₂SO. It is produced as a by-product of wood pulp processing and is notable for its remarkable ability to penetrate biological membranes and intact skin rapidly. Because of this property, DMSO is used both as a therapeutic agent in its own right and as a carrier vehicle to enhance the delivery of other substances across the skin.
Mechanism of Action
DMSO exerts its effects through several distinct mechanisms:
- Membrane penetration: DMSO rapidly crosses biological membranes and intact skin, often carrying other substances along with it (carrier function).
- Anti-inflammatory activity: It inhibits inflammatory mediators, thereby reducing swelling and redness at the site of application.
- Analgesic effect: DMSO can interfere with the transmission of pain signals in nerve fibers, providing pain relief.
- Antioxidant properties: DMSO acts as a free radical scavenger, helping to protect cells from oxidative damage.
- Cryoprotective function: In cell biology and laboratory medicine, DMSO is used to protect cells and tissues from damage during freezing by preventing ice crystal formation.
Medical Applications
Approved Indications
DMSO is approved as a pharmaceutical agent in several countries for specific indications. The most well-known approved use is in the treatment of interstitial cystitis (a chronic bladder condition), where a DMSO solution is instilled directly into the bladder to reduce inflammation and pain. It is also a component of some topical formulations used to treat joint pain, muscle pain, and bruising.
Use in Research and Cell Biology
DMSO is widely used in laboratories worldwide as a cryoprotectant for preserving stem cells, blood products, and other cell cultures. It prevents the formation of ice crystals that would otherwise destroy cells during the freezing process.
Alternative and Complementary Use
Outside of approved indications, some individuals use DMSO for arthritis, sports injuries, nerve pain, and other conditions. However, the scientific evidence supporting these uses is limited, and any such application should only be undertaken under medical supervision.
Dosage and Application Notes
The concentration and form of DMSO used varies depending on the intended application:
- For topical (external) use, solutions of 50-90% DMSO are commonly employed.
- For intravesical application (directly into the bladder), a 50% solution is typically used.
- All applications should be carried out under medical supervision, as DMSO can transport other substances through the skin and may unintentionally amplify their effects.
Side Effects and Safety Information
DMSO is considered relatively safe when used appropriately, but may cause the following side effects:
- Characteristic garlic-like odor: After application, a distinctive garlic- or oyster-like odor may be noticed on the breath and skin. This is caused by the metabolite dimethyl sulfide.
- Skin irritation: Redness, burning, itching, and a sensation of warmth at the application site are common.
- Allergic reactions: Hypersensitivity reactions may occur in rare cases.
- Systemic effects: At high doses or with extensive use, headache, dizziness, and nausea may occur.
- Drug interactions: Because DMSO significantly increases skin permeability, substances applied simultaneously -- including contaminants -- may be absorbed more readily, leading to unexpected reactions.
Contraindications
DMSO should not be used in the following situations:
- Known hypersensitivity to DMSO
- Pregnancy and breastfeeding (insufficient safety data available)
- Severe kidney or liver dysfunction
- Concurrent use of substances whose enhanced absorption could be dangerous
References
- Brayton, C.F. (1986): Dimethyl sulfoxide (DMSO): a review. Cornell Veterinarian, 76(1):61-90.
- European Medicines Agency (EMA): Assessment reports on DMSO-containing medicinal products. Available at: www.ema.europa.eu
- Santos, N.C. et al. (2003): Multidisciplinary utilization of dimethyl sulfoxide: pharmacological, cellular, and molecular aspects. Biochemical Pharmacology, 65(7):1035-1041.
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