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Self-care measures may be helpful for some people:
Always read the patient information leaflet before commencing treatment.
Aciclovir is an antiviral medicine. It stops the infecting virus from reproducing. Since the virus reproduces very early in the infection, you will benefit most from treatment if you take Aciclovir Tablets as soon as the first symptoms appear.
Aciclovir Tablets are used to treat genital herpes viral infections in adults. Genital herpes is a viral infection caused by herpes simplex virus type 1 or 2. It is normally spread by sexual contact. It causes blisters and burning or itching around the genitals, which may be painful. Aciclovir is used to treat genital herpes infections in adults. People who have frequent episodes of genital herpes can also take Aciclovir to help to prevent the attacks.
If you suffer from six or more outbreaks a year suppression treatment may be suitable for you. Suppression treatment is taken every day and helps to prevent recurrent outbreaks by 70-80% and can sometime prevent outbreaks all together. Studies also show that outbreaks are milder and shorter than without suppression treatment.
To treat an outbreak of genital herpes take one tablet three times a day for 5 days. For suppression treatment take one tablet twice a day.
Aciclovir and Valaciclovir are closely related. Valaciclovir is a prodrug of aciclovir which means that after it is taken, it is converted in the body to aciclovir. The advantage of taking valaciclovir over aciclovir is that it doesn’t have to be taken as frequently as so it is more convenient for the patient to comply with the regime. However, aciclovir is more cost-effective especially for suppression treatment. Both medicines are equally effective for treating genital herpes.
Genital herpes is caused by the herpes simplex virus (HSV). Genital herpes is very similar to the herpes that appear on the hands and face ('cold sores'), but is found on or around the penis, anus or vagina. There are two types of herpes virus, HSV-1 and HSV-2. Both types can cause genital herpes. The first episode of infection (primary) with genital herpes is often quite severe. There are blisters and inflammation at the site of infection and the sufferer may feel generally unwell. It is common to have symptoms of burning when passing urine. After the first episode of infection with HSV the virus enters into a dormant phase in the nerve, which supplies feeling to the area where infection occurred. The dormant virus reactivates from time to time to cause recurrences. Some people get symptoms warning them that a recurrence is about to occur, such as itching, tingling or pain in the genital area; blisters or sores may then develop. These tend to be less severe than the symptoms that occurred at the time of the first episode of infection. From time to time the virus may reactivate without causing any symptoms of infection at all.
Genital herpes is spread by direct contact with the infectious virus, via unprotected vaginal or anal sex, genital contact or through oral sex with someone who gets cold sores. Genital herpes and cold sores are both very infectious when an infected person has blisters or sores. It is possible for an infected person to transmit the virus when they have no symptoms of infection. The risk of this happening is probably reduced by using condoms.
The majority of people with genital herpes experience mild and infrequent symptoms. Some people may experience more frequent and severe recurrent episodes. The risk of transmission from a mother to her baby is greatest for babies born to a woman with first episode genital herpes around the time of delivery. Neonatal herpes is potentially life threatening but occurs very rarely in the UK. Women with recurrent herpes prior to pregnancy are at very low risk of transmitting the infection to their babies.
As with all medicines, aciclovir should only be taken after carefully weighing the potential positives and negatives in conjunction with a qualified healthcare professional. Aciclovir is known to cause side effects.
Common sides effects (occurring in one or more people out of one hundred):
A full list of side effects can be found in the Patient Information Leaflet.
Cracked, raw, or red areas around your genitals without pain, itching, or tingling Itching or tingling around your genitals or your anal region Small blisters that break open and cause painful sores. These may be on or around your genitals (penis or vagina) or on your buttocks, thighs, or rectal area. More rarely, blisters may occur inside the urethra -- the tube urine passes through on its way out of your body. Pain from urine passing over the sores -- this is especially a problem in women. Headaches Backaches Flu-like symptoms, including fever, swollen lymph nodes, and fatigue
Impressively quick service. Easy site to navigate and meds delivered by reliable Royal Mail, so well pleased. Thank you!
Great service, easy to navigate the questionnaire and far quicker service than waiting for the NHS services to approve and dispense your meds. Completely legitimate products, unlike so many other bogus sites. I have placed a couple of orders, even today, a Saturday, with estimated delivery this Monday. Awesome! This company has my full 5 star approval.
Full information, quick delivery, follow up email. Professional would not purchase from anyone else.
Fantastic service and very fast delivery, very happy with this service.
Very fast delivery, I am happy with the speed that I got to order what I needed and fast delivery, really needed to start taking the product. Thank you.
Such an easy way to get medication quickly. Superb service and quick delivery. I couldn't even get through to my Drs so although this costs a bit more it's infinitely quicker.
Fantastic and quick response, no hassle trying to get a doctor appointment, thanks MedExpress.
I have used them many times & the procedure is very easy & the delivery very quick.
This is a brilliant service and so quick and efficient. I would have had to wait god knows how long for a GP appointment for this medication.
Checked properly by a doctor before medication was prescribed and aftercare very good. Received yesterday kept up to date with the delivery and had to sign for which I like so there's no missing parcel. Highly recommended.
Trustworthy, professional and speedy delivery service. I have used this pharmacy a few times and I would recommend!

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Dr. Bryony Henderson is Medical Director for MedExpress UK, bringing extensive experience in clinical operations, governance and digital health. She has previously held roles dedicated to delivering safe, scalable care across well-known brands. She is a recognised clinical voice contributing to award-winning campaigns, publishing on health inequalities, and appearing across national media. Here, Bryony leads clinical governance and quality, supporting the delivery of safe, innovative and accessible healthcare.

Adedayo Titiloye is Superintendent Pharmacist responsible for the safe and compliant delivery of pharmacy services across MedExpress. He brings experience across community pharmacy and regional operations, including leadership roles within one of the UK’s largest independent pharmacy groups. Here, Ade focuses on building high-performing teams, improving processes and ensuring pharmacy services deliver safe, effective care at scale.

Dr. Carla Rodrigues is Head of Medical Operations at MedExpress, having previously held leadership roles in primary care networks and across well-known healthcare organisations, and has led scientific society groups in the field of sexual medicine. She has also completed training with MIT, Harvard and INSEAD. At HeliosX, Carla leads medical operations in the UK, overseeing the delivery of safe care pathways and upholding high standards in prescribing and clinical governance.

Dr. Kavir Matharu is a GP Lead at MedExpress, with 10 years’ experience across a range of healthcare settings. She is a practising GP with a background in complex healthcare consulting, having worked on high-level strategic and operational challenges within the health system. She was also selected for a leadership fellowship with the National Medical Director at NHS England. Kavir has a strong interest in healthcare leadership and system improvement, with a focus on high-quality, sustainable care.

Dr. Daryl Perera is a GP Lead at MedExpress, with experience across NHS primary care, urgent care and private practice. He has extensive experience in digital healthcare and clinical leadership, and oversees clinical governance and patient safety across our digital health services. His work spans urgent care and preventative medicine, with particular interests in men’s health, obesity management, and sport and exercise medicine. Daryl has worked across a range of NHS and private healthcare organisations and previously held a GP Director role.

Head of Medical Affairs
BSc (Hons), MSc, PhD
Dr. Sophie Dix is Head of Medical Affairs at MedExpress and a behavioural neuroscientist with over 25 years’ experience across the pharmaceutical industry, charity sector and health technology. Her work has focused on understanding how to manage and treat conditions affecting both mind and body, bringing together scientific insight with real-world care. Sophie is passionate about evidence and ensuring people have access to the right treatment at the right time.

Medical Writer
BSc (Hons), MSc, PhD
Dr. Zoe Lees is a Medical Writer at MedExpress, specialising in clear, evidence-based health communications. She completed her postgraduate research at the University of Glasgow, focusing on metabolic complications of pregnancy and the role of adipose tissue function. Zoe brings a strong scientific foundation to her work and is committed to delivering content that is both accurate and accessible, grounded in robust research.

Dr. Adam Abbs is Medical Director, International at MedExpress responsible for expanding the company into new markets. He has extensive experience in asynchronous and video consultations, technology-enabled remote examinations and home biomarker testing, with a particular interest in educating both patients and doctors. Adam is a published author and is licensed to practice medicine in the UK and across the EU, and is registered in Canada.

Liyya Patel is Deputy Chief Pharmacist at MedExpress UK, with over 10 years’ experience supporting the organisation’s growth and development. She is responsible for ensuring pharmacy services are safe, compliant and meet all regulatory standards, playing a key role in maintaining high-quality clinical care. Liyya previously worked in high-volume community pharmacy settings in Central London and is a qualified pharmacist and independent prescriber.

Dr. Olivia de Rougemont is a GP Lead at MedExpress with over 12 years’ experience across the NHS and private sectors. She has extensive experience in digital and in-person care, with a particular interest in women’s health, preventative medicine, and delivering patient-centred support that feels clear and accessible. Olivia also leads and mentors GPs, and brings a global perspective shaped by her experience working across different healthcare systems.