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rimso-50

Pharmaranks rates Rimso-50 3.5/5 for recall safety — an independent score from its FDA recall history and its manufacturer's record. Rimso-50 (Dimethyl Sulfoxide) is a medication supplied as an irrigant.

Dimethyl Sulfoxide · by Mylan Institutional

70/100Limited · 1 source

Based on 1 source · Recall-safety score from FDA recall history — this product's own recalls and its manufacturer's record. Not an efficacy or quality rating. methodology →

Rated against independent regulatory sources·Last updated August 19, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Active ingredient
Dimethyl Sulfoxide
Form
Irrigant
Strength
Dimethyl Sulfoxide 50%
Type
Prescription (Rx)
Brand or generic
Brand-name
FDA application
NDA017788

What is Rimso-50?

From the FDA label:RIMSO-50 ® (dimethyl sulfoxide) (DMSO) 50% w/w Aqueous Solution for intravesical instillation. Each mL contains 0.54 gm dimethyl sulfoxide STERILE AND NON-PYROGENIC. Intravesical instillation for the treatment of interstitial cystitis. NOT FOR INTRAMUSCULAR OR INTRAVENOUS INJECTION. The active component of RIMSO-50 ® is dimethyl sulfoxide which has the empirical formula C 2 H 6 OS, and is structurally represented as: Dimethyl sulfoxide is a clear, colorless and essentially odorless liquid which is miscible with water and most organic solvents. Other physical characteristics include: molecular weight 78.13, melting point 18.3° C, and a specific gravity of 1.096. Chemical Structure

How to use

Instillation of 50 mL of RIMSO-50 ® (dimethyl sulfoxide) directly into the bladder may be accomplished by catheter or asepto syringe and allow to remain for 15 minutes. Application of an analgesic lubricant gel such as lidocaine jelly to the urethra is suggested prior to insertion of the catheter to avoid spasm. The medication is expelled by spontaneous voiding. It is recommended that the treatment be repeated every two weeks until maximum symptomatic relief is obtained. Thereafter, time intervals between therapy may be increased appropriately. Administration of oral analgesic medication or suppositories containing belladonna and opium prior to the instillation of RIMSO-50 ® can reduce bladder spasm. In patients with severe interstitial cystitis with very sensitive bladders, the initial treatment, and possibly the second and third (depending on patient response) should be done under anesthesia. (Saddle block has been suggested).

Side effects

A garlic-like taste may be noted by the patient within a few minutes after instillation of RIMSO-50 ® (dimethyl sulfoxide). This taste may last several hours and because of the presence of metabolites, an odor on the breath and skin may remain for 72 hours. Transient chemical cystitis has been noted following instillation of dimethyl sulfoxide. The patient may experience moderately severe discomfort on administration. Usually this becomes less prominent with repeated administration.

Warnings

Important safety information

Dimethyl sulfoxide can initiate the liberation of histamine and there has been occasional hypersensitivity reaction with topical administration of dimethyl sulfoxide. This hypersensitivity has been reported in one patients receiving intravesical RIMSO-50 ® . The physician should be cognizant of this possibility in prescribing RIMSO-50 ® . If anaphylactoid symptoms develop, appropriate therapy should be instituted.

Who should not take Rimso-50

None known.

Overdose — what happens if you take too much

The oral LD 50 of dimethyl sulfoxide in the dog is greater than 10 gm/kg. It is improbable that this dosage level could be obtained with intravesical instillation of RIMSO-50 ® in the patient. In case of accidental oral ingestion, specific measures should be taken to induce emesis. Additional measures which may be considered are gastric lavage, activated charcoal and force diuresis.

U.S. Poison Control: call or text 1-800-222-1222 (free, 24/7). In an emergency call 911. From the FDA label; not medical advice.

Dosage forms

Irrigant

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

Ways to save

Ask for the generic

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Request a 90-day supply

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Use copay cards

Manufacturer copay cards & patient-assistance programs — especially for brand drugs.

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Frequently asked questions

How is Rimso-50 rated?
pharmaranks gives Rimso-50 a composite score of 3.5 out of 5, currently based on 1 weighted source (FDA regulatory recall-safety data weighted highest). See our methodology at /how-we-rate.
Is there a coupon or discount for Rimso-50?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Rimso-50. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Rimso-50?
Rimso-50 is marketed by Mylan Institutional. You can see Mylan Institutional's full profile, rating, and other products on pharmaranks.
Is Rimso-50 a brand-name or generic drug?
Rimso-50 is a brand-name product with the active ingredient Dimethyl Sulfoxide.
Is Rimso-50 available over the counter?
No. Rimso-50 is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Rimso-50 come in?
Rimso-50 is currently marketed as irrigant, per the FDA's National Drug Code Directory.
Is Rimso-50 FDA-registered?
Rimso-50 is on record with the U.S. FDA under application number NDA017788. You can verify this on its official FDA label.
Has Rimso-50 been recalled by the FDA?
Rimso-50 has no FDA recalls recorded under its own application in the openFDA enforcement database. Its recall-safety score reflects its manufacturer's overall recall record. This is general reference, not medical advice — check the FDA recall database for the latest alerts.
Is Rimso-50 safe?
There's no single safe-or-not verdict. pharmaranks gives Rimso-50 a recall-safety score of 70/100, based on its FDA recall history (no recalls under its own FDA application) — not an efficacy or side-effect rating. Review its FDA-label side effects and warnings before use, and always consult a licensed professional.
What are the side effects of Rimso-50?
Rimso-50's side effects are taken directly from its FDA label. From the label: A garlic-like taste may be noted by the patient within a few minutes after instillation of RIMSO-50 ® (dimethyl sulfoxide). This taste may last several hours and because of the presence of metabolites, an odor on the breath and skin may remain for 72 hours.… Both common and serious reactions are documented in full on this page. This is general reference from the FDA, not medical advice — always consult a professional.

Clinical content sourced from the FDA label via openFDA (U.S. FDA). View the FDA label on DailyMed → Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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rimso-50

70/100