What is Secukinumab: Uses, Dosage, Side Effects and More

Secukinumab is a targeted medication that helps control severe autoimmune conditions like psoriasis and certain types of arthritis. It works by blocking a specific protein in your immune system that causes inflammation, giving your body a chance to heal and reducing painful symptoms.

This medication belongs to a class called monoclonal antibodies, which are specially designed proteins that work like precision tools in your immune system. Think of secukinumab as a helpful guide that redirects your overactive immune response, allowing your skin and joints to feel more comfortable.

What is Secukinumab?

Secukinumab is a prescription medication that targets interleukin-17A, a protein that drives inflammation in autoimmune diseases. Your doctor might recommend this treatment when other medications haven't provided enough relief from your symptoms.

The medication comes as an injection that you receive either under your skin or through an IV, depending on your specific condition and treatment plan. It's designed to work gradually over time, helping your immune system find a better balance.

Unlike some medications that broadly suppress your immune system, secukinumab works more precisely. It focuses on one specific pathway of inflammation, which often means fewer overall effects on your body's ability to fight infections.

What is Secukinumab Used For?

Secukinumab treats several autoimmune conditions where your immune system mistakenly attacks healthy tissues. Your doctor will determine if this medication is right for your specific situation based on your symptoms and medical history.

The most common conditions treated with secukinumab include moderate to severe plaque psoriasis, where red, scaly patches appear on your skin. Many people find significant improvement in their skin clarity and reduced itching within a few months of starting treatment.

For joint-related conditions, secukinumab can help with psoriatic arthritis, which causes joint pain and swelling in people who also have psoriasis. It may also be prescribed for ankylosing spondylitis, a type of arthritis that primarily affects your spine and can cause stiffness and pain.

Less commonly, your doctor might recommend secukinumab for other inflammatory conditions like non-radiographic axial spondyloarthritis or hidradenitis suppurativa. These are specialized uses that require careful evaluation of your individual health picture.

How Does Secukinumab Work?

Secukinumab works by blocking interleukin-17A, a messenger protein that tells your immune cells to create inflammation. When this protein is overactive, it can cause the painful, uncomfortable symptoms you experience with autoimmune conditions.

This medication is considered a strong, targeted treatment that can provide significant relief for people with moderate to severe symptoms. It's not a mild medication, but rather a specialized tool for conditions that haven't responded well to other treatments.

The blocking action happens gradually, which is why you might not notice immediate changes when you start treatment. Your immune system needs time to adjust to the new balance, and most people begin seeing improvements within 12 to 16 weeks.

Because secukinumab targets a specific pathway, it doesn't suppress your entire immune system like some other medications. However, it can still affect your ability to fight certain infections, so your doctor will monitor you carefully during treatment.

How Should I Take Secukinumab?

Secukinumab is given as an injection, either under your skin (subcutaneous) or through an IV (intravenous), depending on your condition and doctor's recommendation. Your healthcare team will teach you the proper injection technique if you'll be giving yourself the subcutaneous injections at home.

For subcutaneous injections, you can inject the medication into your thigh, upper arm, or abdomen, rotating injection sites to prevent irritation. The medication should be at room temperature when you inject it, so take it out of the refrigerator about 30 minutes before your scheduled dose.

You don't need to take secukinumab with food, and there are no specific dietary restrictions while using this medication. However, maintaining a healthy, balanced diet can support your overall treatment success and help your body respond well to the medication.

If you're receiving IV infusions, these will be done at your doctor's office or infusion center. The process typically takes about an hour, and you'll be monitored during and after the infusion to ensure you're tolerating the treatment well.

How Long Should I Take Secukinumab For?

Secukinumab is typically a long-term treatment, as the conditions it treats are chronic and require ongoing management. Your doctor will work with you to determine the right duration based on how well you respond to the medication and any side effects you experience.

Most people start with a loading phase, receiving injections more frequently for the first few weeks or months. After this initial period, you'll likely transition to maintenance dosing, which might be every 4, 8, or 12 weeks depending on your specific condition.

Your doctor will regularly assess your progress through physical exams, blood tests, and discussions about how you're feeling. If the medication is working well and you're tolerating it without significant side effects, you may continue treatment for years.

Some people may be able to reduce their dosing frequency over time if their condition becomes well-controlled. However, stopping secukinumab suddenly can lead to a return of symptoms, so any changes to your treatment plan should be made gradually under medical supervision.

What Are the Side Effects of Secukinumab?

Like all medications, secukinumab can cause side effects, though many people tolerate it well. Understanding what to expect can help you feel more prepared and know when to contact your healthcare provider.

The most common side effects you might experience are generally mild and manageable. These everyday reactions often improve as your body adjusts to the medication over the first few weeks of treatment.

• Injection site reactions like redness, swelling, or mild pain
• Upper respiratory infections such as colds or sinus infections
• Headaches that are usually mild to moderate
• Diarrhea or mild stomach upset
• Fatigue or feeling more tired than usual

These common side effects typically resolve on their own and don't require stopping the medication. Your doctor can suggest ways to manage them if they become bothersome.

More serious side effects are less common but require immediate medical attention. While these reactions don't happen to most people, it's important to recognize them early so you can get prompt care.

• Serious infections that may develop more easily due to immune system effects
• Inflammatory bowel disease symptoms like severe abdominal pain or bloody stools
• Allergic reactions including difficulty breathing, swelling, or severe rash
• Unusual changes in mood or behavior
• Persistent fever or signs of infection that don't improve

If you experience any of these more serious symptoms, contact your doctor right away. They can help determine if the symptoms are related to your medication and adjust your treatment plan if needed.

Rare but serious side effects include reactivation of tuberculosis or hepatitis B in people who have been previously infected. Your doctor will test for these conditions before starting secukinumab and monitor you throughout treatment.

Who Should Not Take Secukinumab?

Secukinumab isn't right for everyone, and your doctor will carefully review your medical history before recommending this treatment. Certain health conditions or circumstances make this medication potentially unsafe or less effective.

You should not take secukinumab if you have an active, serious infection that hasn't been treated yet. Because this medication affects your immune system, fighting an existing infection becomes more challenging and potentially dangerous.

People with a history of tuberculosis or hepatitis B need special evaluation before starting secukinumab. These infections can become active again when your immune system is modified, so your doctor will test for these conditions and may recommend preventive treatment first.

If you're pregnant or planning to become pregnant, discuss this thoroughly with your doctor. While secukinumab hasn't been extensively studied in pregnancy, it's generally recommended to avoid it unless the benefits clearly outweigh the risks.

Breastfeeding mothers should also have a detailed conversation with their healthcare provider. Small amounts of the medication may pass into breast milk, and the effects on nursing babies aren't fully understood.

People with inflammatory bowel disease like Crohn's disease or ulcerative colitis need careful monitoring, as secukinumab may worsen these conditions in some cases. Your doctor will weigh the benefits against the risks based on your specific situation.

Secukinumab Brand Names

Secukinumab is available under the brand name Cosentyx, which is manufactured by Novartis. This is currently the primary brand name you'll see when your doctor prescribes this medication.

Cosentyx comes in different formulations, including pre-filled syringes and autoinjector pens for home use, as well as vials for intravenous infusion in clinical settings. Your doctor will choose the most appropriate formulation based on your condition and treatment plan.

When discussing this medication with your healthcare team or pharmacist, you can refer to it by either name - secukinumab or Cosentyx. Both refer to the same active ingredient and medication.

Secukinumab Alternatives

Several other medications work similarly to secukinumab for treating autoimmune conditions. Your doctor might consider these alternatives if secukinumab isn't suitable for your situation or if you don't respond well to it.

Other IL-17 inhibitors include ixekizumab (Taltz) and brodalumab (Siliq), which work through similar mechanisms but may have slightly different side effect profiles. These medications target the same inflammatory pathway but might be better tolerated by some people.

TNF inhibitors like adalimumab (Humira), etanercept (Enbrel), and infliximab (Remicade) are another class of biologic medications that can treat similar conditions. These work by blocking a different inflammatory protein called tumor necrosis factor.

For people with psoriasis specifically, IL-23 inhibitors such as ustekinumab (Stelara), guselkumab (Tremfya), and risankizumab (Skyrizi) offer another targeted approach. These medications work upstream in the inflammatory process compared to secukinumab.

Traditional systemic medications like methotrexate, cyclosporine, or oral retinoids might also be considered, especially for people who prefer non-biologic treatments or have specific medical reasons to avoid biologic medications.

Is Secukinumab Better Than Adalimumab?

Secukinumab and adalimumab (Humira) are both highly effective medications, but they work through different mechanisms and may be better suited for different people. Neither medication is universally superior - the best choice depends on your specific condition, medical history, and individual response.

For psoriasis, studies suggest that secukinumab may provide slightly better skin clearing for some people compared to adalimumab. However, adalimumab has been available longer and has extensive research supporting its effectiveness across multiple conditions.

In terms of side effects, both medications can increase infection risk, but they may have different patterns of other side effects. Secukinumab may be less likely to cause certain autoimmune reactions that can occur with TNF inhibitors like adalimumab.

Your doctor will consider factors like your specific diagnosis, previous treatment responses, other health conditions, and personal preferences when choosing between these medications. Many people do well on either treatment, and the decision often comes down to individual factors rather than one being clearly better than the other.