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Study on the Safety and Efficacy of PF-06835375 and Diphenhydramine Hydrochloride for Adults with Moderate to Severe Primary Immune Thrombocytopenia

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What is this study about?

This clinical trial is focused on studying a condition known as Primary Immune Thrombocytopenia (ITP), which is a disorder that can lead to easy or excessive bruising and bleeding due to low levels of platelets in the blood. The study is testing a new treatment called PF-06835375 Injection, which is given as a solution for injection under the skin. The purpose of the study is to evaluate the safety and effectiveness of this treatment in adults with moderate to severe ITP.

Participants in the study will receive the PF-06835375 Injection over a period of 12 weeks. The study will monitor the participants’ platelet counts, which are important for blood clotting, at different points during the study. The goal is to see if the treatment can help increase platelet counts and improve the condition of those with ITP. Another medication, Diphenhydramine Hydrochloride, which is commonly used as an antihistamine, may also be used in the study.

The study will involve regular visits to the clinic for monitoring and assessments. Participants will be closely observed for any side effects or changes in their condition throughout the study period. The information gathered from this study will help determine the potential benefits and risks of using PF-06835375 Injection as a treatment for Primary Immune Thrombocytopenia.

1 initial assessment

Upon joining the study, an initial assessment is conducted to confirm eligibility. This includes reviewing medical history and current health status.

Participants must be between 18 and 70 years old, have a diagnosis of primary immune thrombocytopenia (ITP), and meet specific health criteria.

2 treatment initiation

Participants begin treatment with PF-06835375, administered as a solution for injection.

The medication is given subcutaneously, which means it is injected under the skin.

3 treatment schedule

The study involves two dosage groups: 6 mg and 18 mg of PF-06835375.

Participants receive the medication according to their assigned dosage group.

4 monitoring and evaluation

Regular monitoring of platelet counts is conducted to evaluate the treatment’s effectiveness.

For the 6 mg group, the primary evaluation occurs at Week 12. For the 18 mg group, it occurs at Week 16.

5 safety assessments

Throughout the study, safety assessments are performed to monitor any adverse effects.

These assessments include tracking the type, frequency, and severity of any side effects experienced.

6 study completion

The study is estimated to conclude by March 29, 2025.

Final evaluations are conducted to assess the overall response to the treatment and any changes in health status.

Who Can Join the Study?

  • Participants must be between the ages of 18 and 70 years old.
  • Participants must be willing and able to attend all scheduled visits, follow the treatment plan, undergo laboratory tests, and adhere to lifestyle considerations and other study procedures.
  • Participants must have a diagnosis of Primary Immune Thrombocytopenia (ITP). This means their body has a low number of platelets, which are cells that help blood clot. The diagnosis should follow established guidelines.
  • Participants must have ongoing ITP with platelet counts less than 50,000 per microliter of blood, without severe bleeding in the past month or during screening.
  • Participants must have persistent ITP (lasting 3 to 12 months) or chronic ITP (lasting more than 12 months).
  • Participants must have either not responded to initial therapy or need alternative therapy for ITP, as determined by the study doctor.
  • Participants must have a Body Mass Index (BMI) between 17.5 and 40 kg/m² and weigh more than 40 kg (88 lbs). BMI is a measure of body fat based on height and weight.
  • Participants must be capable of giving signed informed consent, which means they understand the study and agree to participate.

Who Cannot Join the Study?

  • Participants with other serious health conditions that might interfere with the study.
  • Individuals who are currently pregnant or breastfeeding.
  • People who have participated in another clinical trial recently.
  • Participants who have a history of allergic reactions to similar treatments.
  • Individuals with a history of drug or alcohol abuse.
  • People who are unable to follow the study procedures or attend scheduled visits.
  • Participants who have received certain medications that might affect the study results.
  • Individuals with a history of certain blood disorders.
  • People with an active infection that requires treatment.
  • Participants who have had a recent major surgery.

Where you can join this trial?

Verified and Recommended Sites

No sites found in this category

Verified Sites

Site Name City Country Status
InterHem Poradnie Specjalistyczne Bialystok Poland
Uniwersytecki Szpital Kliniczny Im Jana Mikulicza Radeckiego We Wroclawiu Wroclaw Poland

Other Sites

Site Name City Country Status
Komarom-Esztergom Varmegyei Szent Borbala Korhaz Tatabanya Hungary
Tolna Vármegyei Balassa János Kórház Szekszard Hungary
Somogy Varmegyei Kaposi Mor Oktato Korhaz Kaposvar Hungary
Fakultni Nemocnice Hradec Kralove Novy Hradec Kralove Czechia
Semmelweis University Budapest Hungary
Fakultni Nemocnice Kralovske Vinohrady Prague Czechia
Del-Pesti Centrumkorhaz Orszagos Hematologiai Es Infektologiai Intezet Budapest Hungary
Vseobecna Fakultni Nemocnice V Praze Prague Czechia
Uniwersytecki Szpital Kliniczny W Poznaniu Poznan Poland
University Of Pecs Pecs Hungary
University Hospital Ostrava Ostrava Czechia
Aiyjksg Swd z oaer Poznan Poland
Grrxvgaqjnjdrbjcz Vghwmgoxo Pdrz Anrwdn Eividjcl Ovaezi Kauhym Gyor Hungary

Want to learn more about this study or check if you can participate? Contact us.

Trial status

Country Status Recruitment Start
Czechia Czechia
Not recruiting
02.02.2022
Hungary Hungary
Not recruiting
02.02.2022
Poland Poland
Not recruiting
02.02.2022

Trial locations

Investigated drugs:

PF-06835375 is a medication being studied for its safety and effectiveness in treating adults with moderate to severe primary immune thrombocytopenia. This condition is characterized by a low platelet count, which can lead to easy or excessive bruising and bleeding. The trial aims to assess how well this medication can increase platelet counts in participants over a specified period.

Primary Immune Thrombocytopenia – This is a disorder characterized by a low platelet count, which can lead to easy or excessive bruising and bleeding. The condition occurs when the immune system mistakenly attacks and destroys platelets, which are essential for normal blood clotting. It can develop suddenly or gradually and may persist for a short period or become a long-term condition. Symptoms can vary from mild to severe and may include petechiae, which are small red or purple spots on the skin, and bleeding from the gums or nose. The progression of the disease can be unpredictable, with periods of remission and relapse. The exact cause of the immune system’s attack on platelets is often unknown.

Trial ID:
2023-509338-21-00
Protocol code:
C1131003
Trial Phase:
Therapeutic exploratory (Phase II)

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