Injectable Treatments for Severe Psoriasis

Psoriasis is a chronic skin condition that affects millions across the UK, manifesting in red, scaly patches that can be both uncomfortable and distressing. While many individuals find relief with topical creams or light therapy, some experience a more severe form of the condition that requires a different approach. For these cases, doctors often turn to systemic treatments – medications that work throughout the entire body. Among these, injectable therapies, particularly a class of drugs known as biological treatments, represent a significant advancement, offering hope and effective management for those with persistent or widespread psoriasis.

Understanding the Psoriasis Treatment Spectrum

Managing psoriasis is often a journey, starting with milder treatments and progressing to more potent options if symptoms persist or worsen. Initially, your GP might suggest

topical treatments

– creams and ointments applied directly to the skin. These include emollients for moisturising, steroid creams to reduce inflammation, vitamin D analogues to slow skin cell production, calcineurin inhibitors for sensitive areas, coal tar for scaling and itchiness, and dithranol, which suppresses skin cell production. While effective for mild to moderate cases, they may not be sufficient for everyone.

If topical treatments prove insufficient,

phototherapy

might be considered. This involves exposing the skin to specific types of ultraviolet light, such as UVB phototherapy or Psoralen plus Ultraviolet A (PUVA), to slow down skin cell production. These treatments are administered in a hospital or specialist centre under the care of a dermatologist and require multiple sessions over several weeks. However, for those with very severe or widespread psoriasis, or for individuals who haven't responded to these initial approaches, systemic treatments become the next crucial step.

Systemic Treatments: A Deeper Dive

Systemic treatments are medications that act internally, affecting the body's immune system or other processes to control psoriasis. These are generally prescribed by a specialist due to their potency and potential side effects. There are two main types of systemic treatments: non-biological and biological.

Non-biological systemic medications are typically taken as tablets or capsules. Examples include Methotrexate, which slows skin cell production and suppresses inflammation; Ciclosporin, an immunosuppressant; Acitretin, an oral retinoid that reduces skin cell production; and newer drugs like Apremilast and Dimethyl Fumarate, which help reduce inflammation. While highly effective, these non-biological options come with their own set of potential side effects, such as liver damage, kidney issues, or dryness, and require careful monitoring. They also often carry significant considerations regarding pregnancy and contraception.

Biological Treatments: The Injectable Frontier

Biological treatments represent a cutting-edge approach to psoriasis management. Unlike traditional systemic drugs that broadly suppress the immune system, biologicals are designed to target specific components of the immune system that are overactive in psoriasis. This targeted action helps reduce inflammation more precisely. These treatments are predominantly administered as injections and are reserved for individuals with

severe psoriasis

that has not responded to other therapies, or when other treatments are unsuitable. They offer a significant improvement in quality of life for many patients, bringing about substantial skin clearance.

Key Injectable Biological Treatments

Several biological medications are available as injections, each with specific administration schedules and potential side effects. It's crucial to discuss these in detail with your dermatologist to determine the most suitable option for your individual circumstances.

• Etanercept: This biological treatment is typically injected

  twice a week

  . Patients are taught how to self-administer these injections at home. The effectiveness of Etanercept is usually assessed after 12 weeks; if no significant improvement is observed by this point, the treatment will be discontinued. While the most common side effect is a rash at the injection site, Etanercept affects the entire immune system, raising the risk of more serious side effects, including severe infections. There's also a risk of tuberculosis reactivation for those who have had it previously. Close monitoring for side effects is essential throughout the treatment period.

• Adalimumab: Administered as an injection

  once every two weeks

  , Adalimumab is another widely used biological. Patients are also trained to self-inject this medication. Treatment efficacy is evaluated after 16 weeks; if no improvement is seen, it will be stopped. Common side effects include headaches, a rash at the injection site, and nausea. Similar to other biologicals, Adalimumab's impact on the immune system means a risk of serious side effects, particularly severe infections, necessitating continuous monitoring.

• Infliximab: Unlike Etanercept and Adalimumab, Infliximab is given as an

  intravenous drip (infusion)

  directly into a vein at the hospital. The initial treatment schedule involves three infusions within the first six weeks, followed by one infusion every eight weeks. If there's no improvement in psoriasis after 10 weeks, the treatment will be ceased. Headaches are a common side effect. As with other biologicals, the systemic nature of Infliximab means a risk of severe infections, and patients are carefully monitored throughout their therapy.

• Ustekinumab: This treatment involves an initial injection, followed by a second injection four weeks later. Subsequently, injections are given

  every 12 weeks

  , offering a less frequent dosing schedule. Efficacy is assessed after 16 weeks; if insufficient improvement, the treatment will be stopped. The main side effects reported are throat infection and a rash at the injection site. Given its impact on the immune system, there's a risk of serious side effects, including severe infections, requiring ongoing monitoring.

• Other Biological Treatments: The field of biological treatments is continually evolving, with new options becoming available. Other injectable biologicals now recommended for severe psoriasis that hasn't responded to other treatments, or when other treatments are unsuitable, include guselkumab, brodalumab, secukinumab, ixekizumab, bimekizumab, and risankizumab. Each of these targets specific inflammatory pathways, offering tailored approaches to managing the condition.

Comparative Overview of Injectable Biological Treatments

To help illustrate the differences between these important injectable treatments, here's a comparative table:

Important Considerations Before and During Injectable Treatment

Before embarking on any systemic treatment, especially biological injections, an extensive discussion with your doctor is paramount. It is vital to thoroughly understand the

benefits and risks

associated with each option. Your medical history, lifestyle, and specific psoriasis characteristics will all play a role in determining the most appropriate course of action.

A crucial consideration for women is the impact of systemic treatments on pregnancy and breastfeeding. While the provided information specifically highlights non-biologicals like Methotrexate and Acitretin as being very harmful to a developing baby (requiring strict contraception for extended periods), it is a general rule that if you are planning for a baby, are pregnant, or are thinking of breastfeeding, you must speak to your doctor before taking any new medicine to ensure its suitability. Your doctor will assess the risks and benefits for your specific situation.

Throughout the course of treatment with biological injections, you will be closely monitored for any side effects. This monitoring is critical, given the potential for serious complications, particularly severe infections, due to the immune-modulating nature of these drugs. Regular check-ups and prompt reporting of any new symptoms or concerns to your healthcare provider are essential for your safety and the effectiveness of the treatment.

Frequently Asked Questions About Injectable Psoriasis Treatments

Understanding injectable treatments can raise many questions. Here are some common ones:

Who qualifies for injectable biological treatments?

Injectable biological treatments are typically reserved for individuals with severe psoriasis that has not responded adequately to other systemic treatments (like methotrexate or ciclosporin), or when other treatments are not suitable due to contraindications or intolerable side effects. A specialist, usually a dermatologist, will assess your condition and treatment history to determine eligibility.

Are injectable treatments a cure for psoriasis?

No, injectable biological treatments are not a cure for psoriasis. Psoriasis is a chronic condition, and these treatments aim to control the symptoms, reduce inflammation, and improve skin clearance. They help manage the condition effectively, often leading to long periods of remission or significant improvement, but they do not eliminate the underlying cause of psoriasis.

How long do I need to be on these injections?

The duration of treatment varies for each individual and depends on the specific biological drug being used, its effectiveness, and your tolerance to it. Many patients remain on these treatments for extended periods, sometimes for many years, as long as the treatment remains effective and side effects are manageable. Regular reviews with your dermatologist will determine the ongoing need for therapy.

Can I self-inject all biological treatments?

Most biological injections, such as Etanercept, Adalimumab, and Ustekinumab, are designed for self-administration via subcutaneous injection (under the skin) after you've received proper training from a healthcare professional. However, Infliximab is administered as an intravenous infusion and must be given by a healthcare professional in a hospital setting.

What should I do if I experience side effects?

If you experience any new or concerning side effects while on injectable treatments, it is crucial to contact your doctor or healthcare team immediately. They will assess your symptoms and advise on the appropriate course of action, which may include adjusting your treatment or providing supportive care. Never ignore side effects, especially signs of infection.

Conclusion

Injectable biological treatments have revolutionised the management of severe psoriasis, offering significant relief and improved quality of life for many who previously found their condition challenging to control. These targeted therapies work by modulating specific parts of the immune system, leading to a reduction in psoriasis symptoms. While they are powerful tools, they also come with important considerations regarding potential side effects and the need for ongoing medical supervision. If you have severe psoriasis and conventional treatments have not been effective, discuss these advanced injectable options with your dermatologist. Working closely with your healthcare team is key to finding the most effective and safest path to managing your psoriasis.

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