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RecruitingPHASE2INTERVENTIONAL

A Study to Investigate Efficacy and Safety With SAR445399 in Adult Participants With Moderate to Severe Hidradenitis Suppurativa

This study is testing a new medication, SAR445399, for adults who have troublesome skin condition called Hidradenitis Suppurativa (HS). HS causes painful lumps and boils, often in areas like the armpits and groin. The study wants to find out if this new medicine is safe and helps to improve HS symptoms. Participants will be given either the new medicine or a dummy treatment (a placebo) to see if the medicine works better. The study is also trying to figure out the right amount (dose) of the medicine to use. It's a phase 2 study, meaning it's still in the earlier stages of research, checking for effectiveness and safety in a larger group of people.

At a glance

Status
Recruiting
Phase
PHASE2
Sponsor
Sanofi
Enrolment target
144
Start
29 Dec 2025
Estimated completion
01 Dec 2027

What is this study about?

This study is looking into a new treatment called SAR445399 for a skin condition called Hidradenitis Suppurativa (HS). HS is a long-term (chronic) condition that causes painful lumps, boils, and scarring, typically in areas where skin rubs together, such as the armpits, groin, and under the breasts. Living with HS can be very challenging and impact daily life significantly.

The researchers want to see if SAR445399 can help improve the symptoms of moderate to severe HS and if it's safe to use. To do this, some participants will receive SAR445399, while others will receive a 'placebo' – this is an inactive substance that looks just like the real medicine but has no medical effect. This is a common way to test new medicines, as it helps doctors understand if any changes are truly due to the new medicine or if they might happen naturally or from other influences.

This is a 'Phase 2' study, which means it's an important step in developing new treatments. In this phase, doctors are primarily focused on finding the most effective and safest dose of the new medicine for HS. The study involves hospitals and clinics across different countries and is carefully designed to ensure it's as fair and accurate as possible.

Key takeaways

  • Tests a new medicine (SAR445399) for moderate to severe HS.
  • Compares the new medicine to a dummy treatment (placebo).
  • Aims to find out if the medicine is safe and effective.
  • Also looking to find the best dose.
  • Participation involves 16 visits over approximately 46 weeks.
  • You have the right to withdraw from the study at any time.

Who may be eligible?

To join this study, adult participants must have been diagnosed with Hidradenitis Suppurativa (HS) for at least six months. Your HS needs to be affecting at least two different body areas, and at least one of these areas should be classified as moderate or severe. You also need to have at least five active inflamed lumps or painful bumps at the very start of the study.

Another important point is that your doctors must have tried giving you antibiotics for your HS symptoms, and they either didn't work well enough, your symptoms came back after you stopped taking them, or you couldn’t tolerate the antibiotics, or you couldn't take them for other medical reasons. Also, some participants may not have tried any 'biologic' medicines before for HS, while others will have a history of using at least one type of biologic therapy for their HS in the past.

You would not be able to join the study if you have other active skin conditions that might make it hard to check your HS, or if you have certain infections, problems with your immune system, or experienced certain serious health conditions in the past. This includes a history of cancer (unless it was completely treated skin cancer), or if you've had an organ or stem cell transplant.

Could this study suit you?

Answer these quick questions to see if you may be eligible. This is a guide only — the research team makes the final call.

  1. Are you an adult aged 18 or over?
  2. Have you had HS for at least 6 months?
  3. Does your HS affect at least two body areas, with at least one moderate to severe?
  4. Do you currently have at least 5 active inflamed lumps or painful bumps from HS?
  5. Have standard antibiotics for your HS not worked well enough, or could you not take them?
  6. Do you not have other serious health conditions that might interfere with the study?
Answer every question to see your result.

What does participation involve?

If you decide to take part in this study, your journey will last about 46 weeks, which is a bit under a year. During this time, you will have a total of 16 visits to the study clinic or hospital. For the first 32 weeks, you'll be actively receiving either the study medicine (SAR445399) or the dummy treatment (placebo). This 32-week period is split into two halves: for the first 16 weeks, neither you nor your study doctor will know if you're getting the active medicine or the placebo. For the second 16 weeks, you will continue to receive treatment, but during this time, the study team will still be carefully monitoring your progress. Throughout the study duration, you'll have regular appointments where the doctors will check your general health, assess your HS symptoms, and make sure the treatment is safe for you. This will likely involve physical examinations and perhaps some blood tests.

Potential risks and benefits

Taking part in a clinical trial like this could potentially offer new ways to manage your Hidradenitis Suppurativa symptoms, especially if current treatments haven't worked well for you. However, there's no guarantee that the new medicine will help, and you might receive a placebo. Like all medicines, SAR445399 may have side effects, which the study team will carefully monitor. You will be fully informed of any known potential risks before you decide to join, and you are free to leave the study at any time without giving a reason, and your regular medical care will not be affected.

Locations (58)

  • Scottsdale Clinical Trials- Site Number : 8400006
    Verified postcode
    Scottsdale, United States· Recruiting
  • Carbon Health - North Hollywood - NoHo West- Site Number : 8400017
    Verified postcode
    North Hollywood, United States· Recruiting
  • Encore Medical Research of Boynton Beach- Site Number : 8400005
    Verified postcode
    Boynton Beach, United States· Recruiting
  • FXM Clinical Research - Fort Lauderdale- Site Number : 8400013
    Verified postcode
    Fort Lauderdale, United States· Recruiting
  • Alliance for Multispeciality Research - Fort Myers- Site Number : 8400007
    Verified postcode
    Fort Myers, United States· Recruiting
  • Encore Medical Research - Hollywood- Site Number : 8400004
    Verified postcode
    Hollywood, United States· Recruiting
  • Fxm Clinical Research/Fax Pharma Clinical Research- Site Number : 8400014
    Verified postcode
    Miami, United States· Recruiting
  • Florida International Research Center- Site Number : 8400002
    Verified postcode
    Miami, United States· Recruiting
  • Florida Research Center- Site Number : 8400009
    Verified postcode
    Miami, United States· Recruiting
  • Advanced Clinical Research Institute- Site Number : 8400021
    Verified postcode
    Tampa, United States· Recruiting
  • Cleaver Medical Group Dermatology- Site Number : 8400008
    Verified postcode
    Cumming, United States· Recruiting
  • First Georgia Physician Group- Site Number : 8400033
    Verified postcode
    Fayetteville, United States· Recruiting

Common questions

What is Hidradenitis Suppurativa (HS)?

HS is a long-term skin condition causing painful lumps and boils, mainly in areas where skin rubs together like armpits and inner thighs.

What is a 'placebo' in this study?

A placebo is a dummy treatment that looks like the real medicine but contains no active ingredients. It helps researchers see if the actual medicine truly works.

How long will I be in the study?

The study will last for up to 46 weeks, with 32 weeks of active treatment (either medicine or placebo).

Will I know if I'm getting the real medicine or the placebo?

For the first 16 weeks, neither you nor your study doctor will know. This is called a 'double-blind' study to ensure fair results.

Can I leave the study if I change my mind?

Yes, you can leave the study at any time, for any reason, without it affecting your usual medical care.

How to find out more

Trial Transparency email recommended (Toll free for US & Canada)

Always speak to your GP or specialist before deciding to take part in a study.

Interested in taking part?

Register your interest

Share your details and the research team for "A Study to Investigate Efficacy and Safety With SAR445399 in…" will contact you if you may be eligible. Always speak to your GP before agreeing to take part.

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