Adalimumab: what it treats, how to use it, side effects
Last updated September 3, 2026.
Adalimumab is a TNF inhibitor - it blocks a substance in the body that drives inflammation in autoimmune disease. You may know it as Humira. A self-injection on a schedule, prescribed and monitored by specialists - never by Pymander.
What does it treat?
Autoimmune conditions: rheumatoid arthritis, juvenile idiopathic arthritis, psoriatic arthritis, ankylosing spondylitis, Crohn's disease, ulcerative colitis, plaque psoriasis, and more - the diseases where the immune system attacks healthy tissue.
How do you use it?
Subcutaneous - under the skin - on the schedule your specialist sets, often every other week. Training first: the care team teaches the pen before home use. The device warms out of the fridge per its instructions - never heated. Rotate injection sites; into the sharps container after. Never stop or skip without the specialist. Missed dose: inject as soon as you remember, then reset the schedule with your care team.
Side effects to know
- Common: redness, itching, pain, swelling, or bruising at the injection site.
- Serious - call your doctor immediately: the infection warning - this drug lowers your ability to fight infection, and serious infections can need hospital care; report fever, chills, cough, open sores, or infections that linger or return. Also: numbness or tingling, vision problems, easy bruising or bleeding, pale skin, upper-right stomach pain, rash on the face and arms that worsens in sun, swelling of the lower legs, and the allergic set - hives, swelling of face or throat, trouble breathing.
Who should not use it?
Any current infection gates the start. Tell your doctor about immune conditions, nervous-system diseases like multiple sclerosis or Guillain-Barré, optic neuritis, cancer history, diabetes, heart failure, liver problems, TB exposure, and living in regions where severe fungal infections are common, like the Ohio or Mississippi River valleys. Vaccines need the specialist's timing. Surgery - including dental - starts with telling them you take it. If you become pregnant, call your doctor.
When is it an emergency?
High fever, trouble breathing, face or throat swelling, or a seizure is a 911 call. For a dosing error, call Poison Control at 1-800-222-1222. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
What a Pymander AI doctor consult looks like
Illustrative example, not a real member's messages.
Common questions
Why the infection warning?
The mechanism is the risk: blocking TNF calms the autoimmune attack - and quiets infection defense at the same time. Serious infections on this class can need hospital care. The discipline: report infections early - even minor ones, open cuts, cold sores that keep returning - and call before dosing while sick. TB and regional fungal risks are screened before starting, which is why the doctor asks where you have lived.
Why did they ask where I have lived?
Geography maps fungal risk: severe fungal infections are more common in areas like the Ohio and Mississippi River valleys - exposure history changes screening and monitoring. It is one of the more surprising questions in medicine and one of the more practical: the answer decides which tests run before the first dose.
What about vaccines?
Live vaccines pause on this class - the immune system cannot be counted on to handle them - while inactivated ones are timed around doses. The rule: every vaccine goes through the specialist first, including the annual flu shot and travel vaccines. The household matters too: close contacts stay current so they do not bring infections home.
Why did they ask about multiple sclerosis and nerve symptoms?
TNF inhibitors can worsen demyelinating disease - multiple sclerosis, Guillain-Barré, optic neuritis - so that history changes the choice, and new numbness, tingling, or vision problems on the drug are call-immediately items, not watch-and-wait. The ask-list also covers cancer history, diabetes, heart failure, and liver problems: the full map before the first dose.
How do the injections get easier?
Ritual: same day, same time, device warmed per its instructions, sites rotated - abdomen and thighs - and a sharps container doing the cleanup. The site reactions - redness, itching, swelling - fade for most people over the first months. Anxiety fades with repetition: by the fourth or fifth self-injection, the pen is a five-minute errand, not an event.
What happens if I miss a dose of adalimumab?
Inject as soon as you remember, then reset the schedule with your care team - the next dose dates ride on the makeup date. Never double up. The calendar anchor - every other Sunday, marked ahead - is what keeps gaps rare. Travel rule: the medication rides cold in a cooler pack, never frozen, never left in a hot car.