Guselkumab (guselkumab) — Uses, Dosage, Side Effects & Safety

Drug class: Autoimmune & Immunological

Overview

Guselkumab is a prescription medicine used to treat adults with moderate to severe plaque psoriasis and active psoriatic arthritis. It works by blocking a specific protein in the immune system called interleukin-23 (IL-23), which plays a key role in causing inflammation and the overproduction of skin cells in psoriasis. By targeting IL-23, guselkumab helps reduce the symptoms of psoriasis, such as red, scaly patches, and can also improve joint pain and swelling in psoriatic arthritis. Patients often notice clearer skin and less discomfort after regular use. Key points: Guselkumab is given as an injection under the skin, usually every 8 weeks after initial doses. It is not a cure, but it can help manage symptoms and improve quality of life. Always use this medication exactly as prescribed and discuss any concerns with your healthcare provider.

Therapeutic uses

• Plaque Psoriasis
• Psoriatic Arthritis
• Crohn's Disease

Common side effects

• Injection site reactions
• Upper respiratory infections
• Headache
• Diarrhea
• Arthralgia
• Serious infections
• Hypersensitivity reactions

Frequently Asked Questions about Guselkumab

What conditions does guselkumab treat?

Guselkumab is approved for the treatment of moderate to severe plaque psoriasis and active psoriatic arthritis in adults.

How quickly does guselkumab work?

Some patients notice improvement in skin symptoms within a few weeks, but full benefits may take up to 16 weeks or longer.

Can I give myself the injection at home?

Yes, after proper training from your healthcare provider, you can self-inject guselkumab at home. Always follow the instructions provided.

What should I do if I develop an infection while on guselkumab?

Contact your healthcare provider if you develop signs of infection such as fever, chills, cough, or skin sores. Your doctor may advise pausing treatment until the infection resolves.

Is guselkumab safe during pregnancy or breastfeeding?

The safety of guselkumab in pregnancy and breastfeeding is not fully established. Discuss risks and benefits with your doctor if you are pregnant or plan to become pregnant.

Can I receive vaccines while taking guselkumab?

You should not receive live vaccines while on guselkumab. Inactivated vaccines may be given, but consult your healthcare provider first.

What should I do if I miss a dose?

Inject the missed dose as soon as you remember, then continue your regular dosing schedule. Do not double up doses.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.