
Humira (adalimumab) is a prescription drug used to treat inflammatory conditions such as rheumatoid arthritis, Crohn's disease, and plaque psoriasis. It is a tumour necrosis factor (TNF) blocker that works by lowering inflammation and protecting tissues and joints from damage. While Humira can be effective in treating these conditions, it may also cause various side effects, ranging from mild to severe. One of the concerns with Humira is its potential impact on muscles. In this regard, back pain has been reported in 6% of patients, and muscle cramps in less than 5%.
| Characteristics | Values |
|---|---|
| Muscle pain | Back pain (6% of patients), muscle cramps (less than 5% of patients) |
| Cause of muscle pain | Disruption of cytokine balance, triggering antinuclear antibodies (ANA) |
| Other side effects | Skin rashes, allergic reactions, headaches, joint pain, lupus-like syndrome, weight gain, infections, hair loss, uveitis, anxiety, insomnia, depression, mood alterations, serious infections, cancer, nervous system disorders |
| Treatment for side effects | Over-the-counter pain relievers, antihistamines, topical steroids |
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What You'll Learn

Lupus-like syndrome
Humira (adalimumab) is a prescription drug used to treat inflammatory conditions like rheumatoid arthritis, Crohn's disease, and plaque psoriasis. It is a tumour necrosis factor (TNF) blocker that lowers inflammation to protect tissues and joints from damage.
Like many drugs, Humira can cause side effects, including mild and common reactions such as headaches, skin rashes, and injection site reactions. In rare cases, Humira can also cause more serious side effects, including muscle pain.
One of the more serious side effects of Humira is drug-induced lupus, a condition that can include muscle pain. Tumour necrosis factor-alpha (TNF-α) inhibitors like Humira can trigger antinuclear antibodies (ANA), which may cause drug-induced lupus. This condition is known as antitumour necrosis factor-alpha-induced lupus (ATIL) or TNF alpha antagonist-induced lupus-like syndrome.
There have been a few reported cases of systemic lupus erythematosus induced by adalimumab, with many more attributable to treatment with similar drugs such as etanercept or infliximab. In one case, a patient with a history of psoriasis and psoriatic arthritis developed anti-TNF-induced lupus after successful treatment with adalimumab. Another case study describes a patient with severe psoriasis who developed muscle pain and paraesthesia accompanied by ANA titres elevation with adalimumab treatment. The patient's condition resolved after discontinuing adalimumab and switching to ustekinumab.
It is important to note that drug-induced lupus typically resolves with the withdrawal of the causative drug. If you experience persistent muscle pain or other concerning symptoms while taking Humira, it is recommended that you speak with your healthcare provider to rule out underlying conditions and determine the most appropriate course of action.
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Muscle spasms and cramps
Humira (adalimumab) is a prescription drug used to treat inflammatory conditions, including rheumatoid arthritis, plaque psoriasis, Crohn's disease, and ulcerative colitis. It is administered via injection and works by blocking tumor necrosis factor-alpha (TNF-α), a protein involved in inflammation. While Humira can be effective in managing these conditions, it may also cause various side effects, some of which are mild and temporary, while others can be more severe and long-term.
One of the potential side effects of Humira is muscle spasms and cramps. Back pain was reported in 6% of patients taking Humira, and muscle cramps were reported in less than 5% of patients. In rare cases, TNF-α inhibitors like Humira can disrupt cytokine balance, leading to muscle-related symptoms. Additionally, Humira may trigger antinuclear antibodies (ANA), which are associated with drug-induced lupus, a condition that can include muscle pain.
If you experience persistent muscle pain, weakness, or cramps while taking Humira, it is important to consult your healthcare provider. They can help determine whether the symptoms are related to the medication or due to underlying conditions. Your healthcare provider can also advise you on managing these side effects or discuss alternative treatment options if necessary. It is generally not recommended to discontinue Humira without consulting your doctor, as doing so may worsen your medical condition or lead to withdrawal side effects.
To alleviate muscle spasms and cramps caused by Humira, your healthcare provider may suggest over-the-counter pain relievers or other appropriate treatments. It is important to consult your doctor before taking any new medications in conjunction with Humira to ensure their safety and effectiveness. Additionally, staying properly hydrated and maintaining a balanced diet can help prevent or alleviate muscle-related issues.
While muscle spasms and cramps are less common side effects of Humira, it is important to be aware of them and seek appropriate medical advice if they occur. By working closely with your healthcare provider, you can effectively manage these side effects and continue to benefit from the therapeutic effects of Humira.
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Increased risk of certain cancers
Humira (adalimumab) is a medication approved by the U.S. Food and Drug Administration (FDA) for the treatment of certain autoimmune diseases, such as rheumatoid arthritis, plaque psoriasis, Crohn's disease, and ulcerative colitis. While Humira can effectively alleviate the symptoms of these conditions, it is important to be aware of its potential side effects, which include an increased risk of certain cancers.
One of the most significant concerns regarding Humira is its association with an elevated risk of cancer. Studies have shown that people taking Humira or similar biologics have a higher likelihood of being diagnosed with non-melanoma skin cancer, including basal cell and squamous cell carcinomas. This increased risk has led to Humira receiving a boxed warning from the FDA, indicating a serious potential side effect.
In addition to skin cancer, Humira has been linked to other types of cancer, including leukemia and lymphoma. These cancers may develop as a result of Humira's impact on the immune system, which can affect the body's ability to fight infections and may also influence the development of cancerous cells. The risk of cancer is especially pertinent if Humira is prescribed to patients with a history of cancer, and doctors typically avoid prescribing Humira to patients with a history of the disease.
Furthermore, Humira has been associated with the development of hepatosplenic T-cell lymphoma, a rare and life-threatening form of cancer, in young males being treated for ulcerative colitis or Crohn's disease. It is important to note that these patients were also taking other medications, such as azathioprine or 6-mercaptopurine, which may have contributed to the development of this specific type of cancer. However, the association between Humira and this rare cancer underscores the importance of carefully considering the risks and benefits of the medication for each patient.
The potential for Humira to increase the risk of certain cancers highlights the necessity of careful patient monitoring and management. Patients taking Humira should be educated about possible cancer warning signs and symptoms, such as unusual bleeding, bruising, swollen lymph nodes, unexplained weight loss, or changes to the skin, including the development of lumps, sores, or red, scaly patches. Regular cancer screenings and staying up-to-date with recommended vaccinations can help mitigate the risks associated with Humira use.
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Skin-related side effects
When taking Humira (adalimumab), skin-related side effects may occur due to its impact on the immune system and inflammation in the body. These skin issues can vary in severity and presentation, and it is important to monitor them and consult a healthcare professional if they arise.
One of the most common skin-related side effects of Humira is skin rash. This may present as a widespread rash or localized to a specific area. The rash can be itchy, red, and raised, resembling hives or eczema. In some cases, the rash may also be warm to the touch and painful. It is important to keep the skin well-moisturized and avoid irritants that can trigger or exacerbate the rash. Mild over-the-counter corticosteroid creams may be recommended to manage itching and reduce inflammation.
Another possible skin reaction is the development of eczema or dermatitis. Humira can sometimes cause a flare-up of pre-existing eczema or trigger a new case. This may result in dry, itchy, and inflamed skin, often appearing on the face, neck, and hands. Proper skin hydration and the use of gentle, fragrance-free products are crucial to managing this side effect. Topical treatments, such as emollients and prescribed corticosteroid creams, can help soothe the affected areas.
Additionally, patients taking Humira may experience skin infections. The drug's influence on the immune system can increase the risk of bacterial, fungal, or viral skin infections. These may include folliculitis, cellulitis, or herpes simplex infections. It is important to be vigilant for any signs of infection, such as redness, swelling, warmth, or discharge at the site. If a skin infection is suspected, prompt medical attention and appropriate treatment are necessary to prevent further complications.
Less commonly, Humira can lead to the development of skin lumps or nodules. These may appear as firm, movable bumps under the skin and are typically painless. While often benign, these nodules can be a cause for concern and should be evaluated by a healthcare professional. In some cases, further investigations or interventions may be required to rule out more serious underlying conditions.
Lastly, Humira may also be associated with skin discoloration or changes in pigmentation. Some individuals may notice areas of darkened or lightened skin, usually on sun-exposed areas or areas of previous skin injury. While typically harmless, these pigmentation changes can be permanent and may be of cosmetic concern to some individuals. Sun protection and limited sun exposure can help minimize the impact of this side effect.
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Joint pain
Humira (adalimumab) is a prescription drug used to treat rheumatoid arthritis and other conditions, such as psoriatic arthritis, ankylosing spondylitis, Crohn's disease, ulcerative colitis, plaque psoriasis, hidradenitis suppurativa, and uveitis. It is an injectable biologic medication approved by the Food and Drug Administration (FDA) to treat several inflammatory conditions. By blocking the protein tumour necrosis factor (TNF), Humira lowers inflammation, helping to protect tissues and joints from damage.
As with other drugs, Humira can cause side effects, and these may be temporary, lasting a few days or weeks. The most common side effects reported by people who took Humira in clinical trials include mild skin-related reactions, such as rashes and injection site reactions, headaches, upper respiratory infections, sinusitis, and mood alterations, including depression, anxiety, and insomnia. These side effects are typically mild and rarely lead to treatment interruptions.
More serious side effects may occur, including an increased risk of certain cancers, such as leukemia, lymphoma, and non-melanoma skin cancer, as well as nervous system disorders like multiple sclerosis, optic neuritis, and Guillain-Barré syndrome. Humira may also increase the risk of infections, including tuberculosis (TB), fungal infections, and bacterial or viral infections. In rare cases, TNF inhibitors like Humira can disrupt cytokine balance, leading to muscle-related symptoms, or trigger antinuclear antibodies (ANA), which may cause drug-induced lupus—a condition that can include muscle pain.
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Frequently asked questions
Humira can cause muscle pain in rare cases. It can trigger antinuclear antibodies (ANA), which may cause drug-induced lupus—a condition that can include muscle pain. Back pain was reported in 6% of patients taking Humira, and muscle cramps were reported in less than 5% of patients.
Humira can cause several other side effects, including skin rashes, allergic reactions, weight gain, headaches, and injection site reactions. It can also increase the risk of certain cancers, nervous system disorders, and serious infections.
If you experience any side effects from Humira, it is important to consult your doctor or healthcare provider. They can recommend treatment options or alternative medications to manage the side effects. Do not stop taking Humira without consulting your doctor first.

















