ClinicalTrials.gg
AvailableNCT05844436Updated Feb 10, 2025

Expanded Access Intermediate Size Treatment Protocol: Pritelivir for Immunocompromised Subjects with Treatment Resistant Herpes Simplex Virus Type 1 or 2

An expanded access record providing Pritelivir in HSV, sponsored by AiCuris Anti-infective Cures AG. Available. Open to participants aged 16 Years and older. Per ClinicalTrials.gov, last updated 2025-02-10.

Sponsored by AiCuris Anti-infective Cures AG · Expanded access

Study type
Expanded access
Access type
Treatment IND/protocol
Ages
16 Years and older
Sex
All
01

Study summary

AiCuris Anti-infective Cures AG (AiCuris) is developing pritelivir for the oral treatment of acyclovir-resistant (ACV-R) mucocutaneous herpes simplex virus (HSV) infections in immunocompromised subjects.

The purpose of the expanded access program (EAP) is to provide pritelivir to immunocompromised subjects with treatment resistant HSV type 1 or 2 who cannot participate in a clinical trial and for whom no approved treatment option is available.

In view of the available pre-clinical and clinical data for pritelivir in immunocompromised subjects with treatment resistant HSV, the lack of treatment options, and the demand for compassionate use of pritelivir, AiCuris aims to provide access to pritelivir via this expanded access program (intermediate size treatment protocol) in the USA. The patient population is focused on those immunocompromised subjects that are not responding to the available FDA-approved antiviral options or cannot use these because of an underlying medical condition. This EAP enables pritelivir to be available as a treatment option for immunocompromised subjects with treatment-resistant HSV type 1 or 2, who do not have access to clinical trial options.

Read the detailed description

This is a multicenter EAP (via intermediate size treatment protocol) designed to provide access to pritelivir for eligible immunocompromised subjects that are not responding to the available FDA-approved antiviral options or cannot use these because of an underlying medical condition, and who cannot enter a clinical trial. The program will continue until pritelivir becomes available through other mechanisms, or until Sponsor chooses to discontinue the program.

Each subject considered for the EAP will undergo minimal assessment at baseline for lesion assessment and safety (laboratory tests and general physical evaluation). After eligibility check and starting the treatment, the subjects will be monitored on a weekly basis.

02

Conditions studied

  • HSV
03

In context

Lead sponsor

AiCuris Anti-infective Cures AG is the lead sponsor of 9 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
16 Years and older
Sexes eligible
All

Eligibility criteria

Main Inclusion Criteria:

  1. (due to conditions including but not limited to infection, hematopoietic-cell or solid organ transplantation, and chronic use of immunosupressive treatment) men and women of any ethnic group aged ≥16 years.
  2. ACV-resistant and foscarnet-resistant/intolerant mucocutaneous HSV infection based on clinical failure (no improvement after oral or iv doses for at least 7 days at doses equivalent to or greater than the local agency approved high doses of valacyclovir or famciclovir and/or foscarnet iv therapy or intolerance to foscarnet requiring cessation of foscarnet treatment) or result from genotypic/phenotypic testing or ACV-resistant and previously treated in PRIOH-1 Part C.
  3. The current lesion(s) should be confirmed to be positive for HSV before the start of treatment. If not tested beforehand, a lesion swab should be taken for PCR or cell culture before starting treatment, but treatment may be started before obtaining results.
  4. Visual confirmation of lesion at start of treatment (including by endoscopy).
  5. Willing to remain abstinent or use highly effective method of .
  6. Negative pregnancy test for females of at Day 1 and every 4 weeks thereafter.
  7. Patient must be willing and able (in the opinion of the physician) to understand the form.
  8. Patient must give written informed consent.

Main Exclusion Criteria:

  1. Eligibility and feasibility for a patient to participate in a currently ongoing clinical trial with pritelivir.
  2. Known intolerance to pritelivir or any of the (microcrystalline cellulose, croscarmellose sodium, mannitol, colloidal anhydrous silica, magnesium stearate, hydroxy propyl methyl cellulose, polyethylene glycol, calcium diphosphate).
  3. Need to use the following medications at any dose: esomeprazole, rabeprazole. Need to use the medications with the following daily dose levels: omeprazole > 20 mg/d, lansoprazole > 20 mg/d or pantoprazole > 80 mg/d.
  4. Baseline safety laboratory abnormalities:

    1. ANC \< 1000 cells/mm3
    2. count \< 25,000 cells/mm3
    3. \< 8.0 g/dL
    4. or ALT > 5 x
    5. > 2.5 x ULN
  5. History or current evidence of gastrointestinal malabsorption which, in the opinion of the physician, may affect the extent of absorption of pritelivir.
  6. Hemodialysis for any indication and ESRD ( \<15 mL/min; stage 5 CKD).
  7. History or current evidence of significant cardiovascular, pulmonary, hepatic, renal, gastrointestinal, hematological, endocrinological, metabolic, neurological, psychiatric, or other diseases, which, in the opinion of the physician, may affect the patient's safety.
  8. Abnormalities in hematological, clinical chemical or any other laboratory variables regarded as by the physician unless they are due to underlying disease or condition.
  9. Not able to communicate meaningfully with the physician and site staff.
  10. Any other condition which in the opinion of the physician would interfere with successful completion of the treatment.
  11. Pregnant and/or breastfeeding women.
Terms in these criteria, in plain language(13)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

05

Access details

Study type
Expanded access
Access type
Treatment IND/protocol

Available treatment

  • Participants receive a loading dose of 400 mg (4 x 100 mg tablet) pritelivir on first day followed by continuous dose of 100 mg per day.

06

Where to request access

No study locations are listed for this record.

07

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 10, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
08

Registry details

Key details

Study ID
NCT05844436
Lead sponsor
AiCuris Anti-infective Cures AG
Collaborators
Impatients N.V. trading as myTomorrows
Responsible party
Sponsor
First posted
May 6, 2023
Last update
Feb 10, 2025

Study contacts

mytomorrows.com
Contact
aicuris.medical@mytomorrows.com
+31 885253888
View the source record on ClinicalTrials.gov ↗

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