Skip to content
Clinical Trials – home
Not recruitingRare disease

Study on the Effectiveness and Safety of Silibinin for Patients with Active Cushing's Disease

Verified siteInvestigationalNo placebo
Clinical Trials Concierge

Prefer not to search? Our Concierge searches the trials for you.

What is this trial about?

A plain-language summary of the goals, design and what participants do

This clinical trial is focused on studying the effects of a treatment called Silycus® for patients with Cushing's disease. Cushing's disease is a condition where the body produces too much of a hormone called cortisol, which can lead to various health issues. The treatment being tested, Silycus®, contains an active substance known as silibinin, which is derived from milk thistle fruit. The purpose of the study is to evaluate whether Silycus® can help reduce or normalize the excess cortisol levels in patients with active Cushing's disease.

Participants in the study will take Silycus® in the form of granules in a sachet, which they will consume orally. The study will last for a period of 12 weeks, during which the effects of the treatment on cortisol levels will be monitored. The study will also assess changes in clinical signs and symptoms of Cushing's disease, such as body weight, blood pressure, and glucose control. Additionally, the safety of Silycus® will be evaluated by monitoring any adverse events that may occur during the study.

The trial aims to provide valuable information on the potential benefits of Silycus® for managing Cushing's disease. By the end of the study, researchers hope to determine if Silycus® can effectively lower cortisol levels and improve the overall health of patients with this condition. The findings from this study could contribute to better treatment options for individuals living with Cushing's disease.

The research process

The trial runs in 6 steps – from screening to follow-up. Each step says what happens and what the team monitors.

  1. Step 1

    Joining the study

    Upon joining the study, you will be asked to provide written informed consent. This means you agree to participate and follow the study's requirements.

    Your medical records will be reviewed to confirm your diagnosis of Cushing's disease.

  2. Step 2

    Initial assessment

    An initial assessment will be conducted to measure your 24-hour urinary free cortisol (UFC) levels, late night salivary cortisol, and response to a low dose of dexamethasone. These tests help evaluate your current condition.

  3. Step 3

    Medication administration

    You will begin taking Silycus®, which contains the active substance silibinin. This medication is provided in the form of granules in a sachet for oral use.

    The dosage and frequency of administration will be adjusted based on your response to the medication. This process is known as dose titration.

  4. Step 4

    Ongoing monitoring

    Throughout the study, your cortisol levels will be regularly monitored to assess the effectiveness of the treatment. This includes checking UFC, late night salivary cortisol, and response to dexamethasone.

    Your clinical signs and symptoms, such as body weight, blood pressure, and glucose control, will also be evaluated.

  5. Step 5

    Safety assessment

    The safety of Silycus® will be monitored by recording any adverse events you may experience. This helps ensure the treatment is safe for you.

  6. Step 6

    Final evaluation

    After 12 weeks of treatment, a final evaluation will be conducted to determine the overall effectiveness and safety of the medication.

    The study aims to see if your cortisol levels have normalized or decreased significantly, and if your clinical symptoms have improved.

Who can join the trial?

9 criteria

  • Must be an adult, meaning you are 18 years or older.
  • Can be either female or male.
  • Must have active Cushing's disease. This will be confirmed by medical guidelines and records.
  • Must have a high level of cortisol in the body, which is a hormone. This is checked by:
    • 24-hour urine test showing cortisol levels 1.5 times above normal.
    • Late-night saliva test showing high cortisol levels in at least two tests.
    • Blood test after taking a small dose of a medicine called dexamethasone, showing cortisol levels higher than 1.8 micrograms per deciliter in the morning.
    • Must be on inadequate or not tolerated treatments for Cushing's disease, with the possibility to stop these treatments for a short period.
    • If newly diagnosed with Cushing's disease, you must not be a candidate for surgery or have surgery delayed beyond the study period.
    • Must be willing to provide written consent to participate in the study and follow the study requirements.

Who cannot join the trial?

9 criteria

  • Patients who do not have Cushing's disease cannot participate.
  • Patients who are not within the specified age range cannot participate.
  • Patients who are not willing to follow the study procedures cannot participate.
  • Patients who are pregnant or breastfeeding cannot participate.
  • Patients with other serious health conditions that might interfere with the study cannot participate.
  • Patients who are currently participating in another clinical trial cannot participate.
  • Patients who have had recent surgery or are planning to have surgery soon cannot participate.
  • Patients who have a history of drug or alcohol abuse cannot participate.
  • Patients who are unable to provide informed consent cannot participate.
Clinical Trials Concierge

Prefer not to search? Our Concierge searches the trials for you.

Tell us about your condition – we search every trial in Europe and connect you with the right site.

We usually reply within a few days

Verified sites

All sites with verified contact details – recruitment status may not be available; ask directly

Trial locations

Where you can join this trial

Countries are shaded by recruitment status. Click a recruiting country to ask about joining there.

Not recruiting
Not finding your country?

Not sure what to do next?

Joining a clinical trial can seem overwhelming. We guide you step by step, so you know exactly what to expect and how we support you through the process.

See the full process and FAQ

Investigated drugs

Silycus® is a medication being studied for its potential to help people with Cushing's disease. Cushing's disease is a condition where the body produces too much of a hormone called cortisol. This medication aims to reduce the amount of cortisol in the body to normal levels. The study is looking at how well Silycus® works by measuring cortisol levels in different ways, such as through urine and saliva tests, or by seeing how the body responds to another medication that usually lowers cortisol levels. The goal is to see if Silycus® can effectively manage the symptoms of Cushing's disease by controlling cortisol production.

What is already known about the treatment

Silycus® – Silycus® is administered orally in the form of tablets and is currently being studied for its effectiveness in treating Cushing's disease, a condition characterized by excessive cortisol production. The medication is in the clinical trial phase, where researchers are evaluating its ability to reduce or normalize cortisol levels in patients. Silycus® works by targeting specific pathways in the body to help control cortisol secretion, aiming to bring it back to normal levels. It is classified as a therapeutic agent for endocrine disorders, specifically focusing on conditions related to hormone imbalances.

Investigated diseases

Cushing's disease – Cushing's disease is a condition caused by an excess of cortisol, a hormone produced by the adrenal glands. This overproduction is often due to a pituitary gland tumor that secretes adrenocorticotropic hormone (ACTH), which stimulates cortisol production. The disease progresses with symptoms such as weight gain, particularly around the abdomen and face, high blood pressure, and changes in skin appearance, including easy bruising and purple stretch marks. Muscle weakness and fatigue are also common as the disease advances. Over time, individuals may experience mood changes, such as depression or anxiety, and difficulties with glucose control, leading to diabetes. The progression of Cushing's disease can lead to complications affecting various body systems if not managed.
Trial detailsLast updated 2 Oct 2026
Age18+ yearsPhasePhase IITrial ID2024-518869-99-00Protocol codeSILYCUS-21Estimated enrolment15 patientsSponsorIstituto Biochimico Italiano Giovanni Lorenzini S.p.A.

sourced from the EU Clinical Trials Register and site verification

Want to learn more about this trial or check if you can participate?

Clinical Trials Concierge

Prefer not to search? Our Concierge searches the trials for you.

Tell us about your condition – we search every trial in Europe and connect you with the right site.