ViiV HEALTHCARE’S CABOTEGRAVIR FOR HIV PREVENTION RECEIVES POSITIVE CHMP OPINION FROM EUROPEAN MEDICINES AGENCY

London, 24 July 2023 – ViiV Healthcare, the global specialist HIV company majority owned by GSK, with Pfizer and Shionogi as shareholders, welcomed a positive opinion by the European Medicines Agency's (EMA) Committee for Medicinal Products for Human Use (CHMP) recommending marketing authorisation for cabotegravir long-acting (LA) injectable and tablets for HIV prevention. Cabotegravir is recommended in combination with safer sex practices for pre-exposure prophylaxis (PrEP) to reduce the risk of sexually acquired HIV-1 infection in high-risk adults and adolescents weighing at least 35 kg.

In Europe, strong progress has been made in the delivery of HIV treatment and prevention services, seeing a continuous decline in the incidence of new HIV cases. However, with approximately 100,000 new diagnoses each year, if approved, cabotegravir LA will be the only prevention option for people at risk of HIV acquisition that is administered as few as six times per year.⁵

Kimberly Smith, M.D., MPH, Head of Research & Development at ViiV Healthcare, said: “The expansion of prevention options is critical if we are to end the HIV epidemic. Long-acting options have the potential to play an important role in reducing challenges such as inconsistent adherence to taking daily pills, and stigma associated with oral PrEP use that can be faced by people who could benefit from PrEP. At ViiV Healthcare we are at the forefront of cutting-edge science, developing innovative solutions to address the biggest unmet needs in HIV prevention. With the CHMP positive opinion, we are hopeful that people in Europe will soon be able to benefit from greater choice”.

The positive opinion is supported by data from two international phase IIb/III multicentre, randomised, double-blind, active controlled studies, HPTN 083 and HPTN 084, which evaluated the safety and efficacy of cabotegravir LA for PrEP in HIV-negative men who have sex with men, transgender women, and cisgender women who were at increased risk of acquiring HIV. The studies demonstrated that cabotegravir LA for PrEP was superior to daily oral emtricitabine/tenofovir disoproxil fumarate (FTC/TDF), with clinical trial participants given cabotegravir LA experiencing a 69% lower rate of HIV acquisition compared to FTC/TDF tablets in HPTN 083 (12 vs 39; annual incidence: 0.37% vs 1.22%; HR 0.31 [CI: 0.16, 0.58]) , and a 90% lower rate of HIV acquisition compared to FTC/TDF tablets in HPTN 084 (3 vs 36; annual incidence: 0.15% vs 1.85%; HR 0.10 [CI: 0.04, 0.27]).^1,2,3,4

Cabotegravir LA for PrEP is currently approved for use in the US, Australia, Zimbabwe, South Africa, Malawi, Botswana, and Brazil as Apretude. Submission to other regulatory agencies is on-going.

About cabotegravir extended-release injectable suspension

Cabotegravir long-acting for HIV prevention is the first and only long-acting injectable PrEP option proven superior to daily oral FTC/TDF in reducing HIV acquisition.

Cabotegravir long-acting for PrEP is an integrase strand transfer inhibitor (INSTI). INSTIs, like cabotegravir extended-release injectable suspension, inhibit HIV replication by preventing the viral DNA from integrating into the genetic material of human immune cells (T-cells). This step is essential in the HIV replication cycle and is also responsible for establishing chronic disease.

Cabotegravir long-acting for PrEP is provided as an injection administered six times per year by a healthcare professional and is initiated with a single 600 mg (3-ml) injection given one month apart for two consecutive months. After the second initiation injection, the recommended continuation injection dose is a single 600 mg (3-ml) injection given every two months. Cabotegravir oral tablets may be administered for approximately one month before initiating the first injection to assess the tolerability of the medicine.

About HPTN 083 (NCT02720094)^1,3

The HPTN 083 trial is a phase IIb/III double blind non-inferiority trial designed to evaluate the safety and efficacy of long-acting injectable cabotegravir for HIV prevention administered every eight weeks compared to daily oral FTC/TDF tablets (200 mg/300 mg). The trial included the prespecified ability to test for superiority of long-acting cabotegravir over FTC/TDF.

The trial design included an oral lead-in phase to assess tolerability to cabotegravir before administering the intramuscular (IM) injection. Each participant was to receive a maximum of three years of blinded trial medication. The trial opened to enrolment in November 2016. HPTN 083 was conducted in 4,566 HIV-negative men who have sex with men and transgender women who have sex with men, who are at increased risk of HIV acquisition. The trial is being conducted at research centres in Argentina, Brazil, Peru, the United States, South Africa, Thailand, and Vietnam.

Long-acting cabotegravir was found to be superior to daily oral FTC/TDF in preventing HIV acquisition in the trial population. The most common adverse reactions (all grades) observed in at least 1% of subjects receiving long-acting cabotegravir were injection site reactions, diarrhoea, headache, pyrexia, fatigue, sleep disorders, nausea, dizziness, flatulence, and abdominal pain.

For further information on HPTN 083 please see https://clinicaltrials.gov/ct2/show/NCT02720094.

About HPTN 084 (NCT03164564)^2,4

The HPTN 084 trial is a phase III double blind superiority trial designed to evaluate the safety and efficacy of the long-acting injectable cabotegravir for HIV prevention administered every eight weeks compared to daily oral FTC/TDF tablets (200 mg/300 mg) in 3,224 cisgender women who are at increased risk of HIV acquisition. The trial design included an oral lead-in phase to assess tolerability to cabotegravir before administering the IM injection. HPTN 084 opened to enrolment in November 2017 and is being conducted at research centres in Botswana, Kenya, Malawi, South Africa, Eswatini, Uganda, and Zimbabwe.

Long-acting cabotegravir was found to be superior to daily oral FTC/TDF in preventing HIV acquisition in the trial population. The most common adverse reactions (all grades) observed in at least 1% of subjects receiving long-acting cabotegravir were injection site reactions, diarrhoea, headache, fatigue, sleep disorders, nausea, dizziness, abdominal pain, vomiting, myalgia, and rash.

For further information please see https://clinicaltrials.gov/ct2/show/NCT03164564.

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