How to Find RIMSO-50 in Stock Near You (Tools + Tips)

Finding RIMSO-50 (dimethyl sulfoxide) can feel like an impossible task. Unlike most medications, it is not stocked on the shelves of your neighborhood pharmacy. It flows through specialty channels — urology clinics, hospital pharmacies, and specialty distributors — making availability unpredictable. But with the right tools and approach, you can track it down.

This guide walks you through concrete, step-by-step strategies to find RIMSO-50 in stock near you in 2026.

Why Is Finding RIMSO-50 Different From Other Medications?

RIMSO-50 is an intravesical solution — it is placed directly into the bladder by a healthcare provider in a clinic, not picked up by the patient at a retail pharmacy. This means the drug is primarily stocked by:

Urology and urogynecology practices

Hospital outpatient pharmacies

Specialty pharmacies that supply medical practices

Compounding pharmacies (for the generic dimethyl sulfoxide formulation)

Standard pharmacy locator tools used for retail medications often will not be helpful for RIMSO-50. You need a different approach.

Step 1: Start With Your Urologist's Office

Your urologist's office is your first and best resource. Most urology practices that perform bladder instillations either stock RIMSO-50 themselves or have an established relationship with a specialty pharmacy that supplies it. When you call to schedule your next instillation, ask directly: "Do you currently have RIMSO-50 in stock, or is there anything I should know about availability?"

If your clinic is having trouble sourcing the drug, ask them to contact additional specialty distributors or to consider ordering the generic dimethyl sulfoxide from Sandoz as an equivalent substitute.

Step 2: Contact Specialty Pharmacies Directly

Specialty pharmacies are accustomed to sourcing drugs that are not available at retail locations. Large specialty pharmacies such as Shields Health Solutions, Optum Specialty Pharmacy, CVS Specialty, and Walgreens Specialty Pharmacy may be able to obtain RIMSO-50 or its generic equivalent. Call each and ask specifically for "dimethyl sulfoxide 50% intravesical solution" — they may recognize the generic name more readily than the brand name.

Step 3: Ask About the Generic Version

Sandoz manufactures a generic dimethyl sulfoxide 50% intravesical solution that is bioequivalent to brand-name RIMSO-50. If your clinic or pharmacy is having trouble sourcing the brand, ask whether they can obtain the Sandoz generic. The active ingredient, concentration, and route of administration are identical. For most patients, the generic works just as well.

Step 4: Check Hospital Outpatient Pharmacies

Large hospital systems often maintain their own pharmaceutical supply chains and may have access to RIMSO-50 even when retail and specialty pharmacies are out of stock. If you are treated at a hospital-affiliated urology clinic, ask the clinic's pharmacy department about availability. If not, consider contacting a nearby academic medical center or large hospital system's outpatient pharmacy.

Step 5: Use medfinder to Search for You

Instead of calling pharmacies one by one yourself, medfinder does the calling for you. You enter your medication, dose, and zip code — medfinder calls pharmacies in your area to check which ones can fill your prescription, then texts you the results. This saves a significant amount of time and frustration for patients who have already spent hours on the phone with little luck.

Step 6: Plan Your Treatments in Advance

Because RIMSO-50 is given every two weeks, you have a predictable treatment schedule. Use that predictability to your advantage — check on supply 1–2 weeks before each scheduled instillation rather than the day before. If your clinic confirms the drug is in stock for your next appointment, you can proceed with confidence. If not, you have time to source it elsewhere.

Step 7: Know Your Alternatives

If all attempts to find RIMSO-50 fail, talk with your urologist about bridge options. Alternatives such as intravesical heparin instillations, oral pentosan polysulfate sodium (Elmiron), or oral tricyclic antidepressants like amitriptyline can help manage IC symptoms while you work to secure RIMSO-50. See our full guide on alternatives to RIMSO-50 for a complete overview.

A Note on Industrial and Veterinary DMSO Products

Important: Only RIMSO-50 and the Sandoz generic dimethyl sulfoxide are approved for human intravesical use. Industrial-grade DMSO and veterinary DMSO products are NOT safe for human bladder instillation. The purity standards are different, and impurities in non-pharmaceutical-grade products can cause serious harm. Always confirm your provider is using a pharmaceutical-grade product.

For more background on why RIMSO-50 is hard to find, read our article: Why Is RIMSO-50 So Hard to Find?.