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HIV Pre-Exposure Prophylaxis 'PrEP'

PrEP is a drug taken by HIV-negative people before sex that reduces the risk of getting HIV.

PrEP, short for Pre-Exposure Prophylaxis, is one of the most significant advances in HIV prevention in modern medicine.

When taken correctly, PrEP reduces the risk of acquiring HIV through sexual contact by well over 99%, making it one of the most effective preventative interventions available in any area of healthcare.

At The Wright Practice, we provide comprehensive PrEP assessment, prescribing and ongoing monitoring tailored to individual circumstances.

What Is PrEP?

PrEP is a medication taken before potential HIV exposure in order to prevent infection becoming established within the body.

Unlike PEP (Post-Exposure Prophylaxis), which is taken after a potential exposure, PrEP is designed to provide protection before exposure occurs.

The medication works by preventing HIV from replicating within the body should exposure occur. If HIV is unable to establish infection, transmission is effectively prevented.

What Medication Is Used For PrEP?

In the UK, PrEP most commonly consists of a medication containing two antiretroviral drugs: tenofovir disoproxil and emtricitabine.

Many patients know this medication by the original brand name Truvada®, although several equivalent generic formulations are now available and are equally effective.

These medications have been extensively studied and have formed the foundation of modern HIV prevention programmes worldwide for many years.

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Who Should Consider PrEP?

PrEP may be appropriate for a wide range of individuals.

Examples include:

  • Men who have sex with men (MSM)
  • Individuals with multiple sexual partners
  • Individuals whose partner is HIV positive and not known to be undetectable
  • Those who do not consistently use condoms
  • Individuals with a recent bacterial STI
  • People who feel their future risk of HIV exposure may be increased

The decision to start PrEP should always be individualised and based on a discussion of personal circumstances, sexual practices and risk profile.

Many patients are surprised to learn that PrEP is no longer reserved for traditionally high-risk groups and may be appropriate for anyone who wishes to reduce their risk of HIV acquisition.

How Effective Is PrEP?

When taken correctly, PrEP is extraordinarily effective.

Large international studies have demonstrated reductions in HIV acquisition of greater than 99% for sexual transmission when medication is taken as prescribed.

In practical terms, HIV acquisition whilst taking PrEP correctly is exceptionally rare.

The vast majority of documented cases occur in situations involving:

  • Delayed initiation
  • Poor adherence
  • Incorrect dosing
  • Stopping PrEP prematurely
  • HIV infection already being present before PrEP was started

For this reason, assessment before commencing treatment remains important.

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Daily PrEP

Daily PrEP involves taking medication every day regardless of sexual activity. This is the simplest regimen and is suitable for most patients.

Advantages include:

  • Consistent protection
  • Simplicity
  • No requirement to predict sexual activity
  • Suitable for all populations

For many individuals, daily dosing becomes part of a normal daily routine and offers the greatest peace of mind.

Event-Based PrEP (2-1-1 Dosing)

Some individuals may be suitable for event-based PrEP, sometimes referred to as “on-demand” or “2-1-1” PrEP.

This involves taking:

  • Two tablets between 2 and 24 hours before sex
  • One tablet 24 hours after the initial dose
  • One tablet 48 hours after the initial dose

Event-based dosing is supported by strong evidence in certain populations, particularly men who have sex with men. However, it is not suitable for everyone and requires a clear understanding of the dosing schedule. For this reason, it is important that patients receive appropriate advice before using event-based PrEP.

What Assessment Is Required Before Starting PrEP?

Before prescribing PrEP, it is important to ensure that HIV infection is not already present.

Assessment may include:

  • HIV testing
  • Kidney function testing
  • Hepatitis B screening
  • Sexual health screening
  • Review of current medications
  • Discussion of sexual health goals and risk profile

What Monitoring Is Required?

PrEP should not be viewed as a prescription that is issued indefinitely without review.

Ongoing monitoring typically includes:

  • HIV testing
  • Kidney function assessment
  • STI screening
  • Review of adherence
  • Review of side effects
  • Vaccination review where appropriate
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Can PrEP Protect Against Other STIs?

No.

PrEP is highly effective at preventing HIV infection but does not protect against:

  • Gonorrhoea
  • Chlamydia
  • Syphilis
  • Herpes
  • HPV
  • Hepatitis C

For this reason, regular sexual health screening remains important even when taking PrEP. Increasingly, discussions may also include vaccination and other preventative strategies such as Doxy-PEP where appropriate.

What Are The Side Effects Of PrEP?

Most individuals tolerate PrEP extremely well. Side effects are generally mild and, when they occur, often improve after the first few weeks of treatment.

Potential side effects may include:

  • Nausea
  • Headache
  • Gastrointestinal upset

Long-term monitoring of kidney function forms part of routine follow-up. For the vast majority of patients, PrEP is safe, well tolerated and straightforward to use.

PrEP And Relationships

PrEP is used by people in a wide variety of relationship situations. Some individuals use PrEP whilst single. Others use PrEP within long-term relationships.

Some patients choose PrEP because they value the additional reassurance it provides, even when their overall level of risk is relatively low. The decision to use PrEP should be viewed as a positive and proactive healthcare choice rather than a reflection of lifestyle or behaviour.

Key Points

  • PrEP is one of the most effective HIV prevention strategies ever developed.
  • When taken correctly, it reduces the risk of sexual HIV transmission by well over 99%.
  • Both daily and event-based dosing may be appropriate depending on circumstances.
  • HIV testing and monitoring remain essential whilst taking PrEP.
  • PrEP does not protect against other sexually transmitted infections.
  • PrEP should be viewed as part of a broader approach to sexual health and prevention.
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Our approach at The Wright Practice

We believe that PrEP should be accessible, evidence-based and tailored to the individual.

At The Wright Practice, we provide:

  • Initial PrEP assessment
  • Baseline investigations
  • Daily and event-based PrEP advice
  • Ongoing monitoring
  • HIV testing
  • Sexual health screening
  • Vaccination advice

Our aim is to help patients make informed decisions about HIV prevention and ensure that PrEP is used safely, effectively and with confidence.

Meet our team

Dr Daniel Wright
MD MRCGP MA (Hons) BA (Hons)
Dr. Susan Jain
MD MRCGP MA (Hons) BA (Hons)
Nathan Hunt
Practice Manager

What our patients say on Google

Wow! Dr. Dan was extremely knowledgeable and attentive to my health and well being. I’m so glad to have found him!

John Rutherford
John Rutherford

I have been going to Dr Wright for a number of years now. He is highly knowledgeable, compassionate, open minded and efficient, I couldn’t recommend him highly enough

Peter Jones
Peter Jones

I have been a patient of Doctor Dan for some time and continue to consult with him despite having left the UK. Dan has the enthusiasm and energy of a young man, whilst taking the holistic “physician” approach of an old school family doctor, equipped with the most modern insights and technology.

Steve Smith
Steve Smith

Dr Jain was great. Expert knowledge with practical advice

George Mosley
George Mosley

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Schedule a consultation | Call: +44 (0)207 139 1833 | Email: info@thewrightpractice.com

101 Harley Street, London, W1G 6AH

The Wright Practice

101 Harley Street, London, W1G 6AH, United Kingdom

Rated ★ ★ ★ ★ ★ from 192 Reviews

Opening hours
Monday
9.00 - 17.00
Tuesday
9.00 - 17.00
Wednesday
9.00 - 17.00
Thursday
9.00 - 17.00
Friday
9.00 - 17.00
Saturday
9.00 - 17.00
Sunday
Closed
The Wright Practice
101 Harley Street, London, W1G 6AH, United Kingdom
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