Methotrexate vs Otezla

Methotrexate: An old, inexpensive tablet or injection for severe psoriasis and psoriatic arthritis. It is taken once a week, not daily, and it needs regular blood tests. Otezla: An oral pill for plaque psoriasis, psoriatic arthritis and the mouth ulcers of Behcet's disease. It needs no routine blood tests, and it is gentler and less powerful than the injected treatments.

Reviewed by Dr. Schwarz, Board-Certified Dermatologist

An amber pill bottle labeled Otezla tipped over with white tablets spilling out

Which one?At a glance What it treats Diagrams How you take it Results Side effects Safety Cost When you stop Questions

Which one is right for you?

Choose Methotrexate if…

Choose for severe psoriasis, especially with joint pain, as an inexpensive weekly treatment with regular blood tests.

Psoriasis with psoriatic arthritis
Cost matters and biologics aren't covered
You can avoid alcohol and keep up blood tests

Choose Otezla if…

Choose for moderate psoriasis or psoriatic arthritis when you want a pill with no routine blood tests, accepting it's gentler than injections.

Moderate psoriasis or scalp psoriasis
You'd rather avoid injections
No routine blood tests appeals

Use care together

Can you take them together?

Usually used one at a time, though occasionally combined for psoriasis or psoriatic arthritis under specialist care.

At a glance

● Methotrexate

● Otezla

Type

Oral or injected immune suppressant

Oral PDE4 inhibitor (apremilast)

What it does

Calms overactive immune cells and skin-cell growth

Turns down several inflammation signals

Best for

Severe psoriasis and psoriatic arthritis

Moderate plaque psoriasis and psoriatic arthritis

Prescription

Yes

Form

Tablet or injection

Tablet

How often

Once a week — never daily

Twice daily after a 5-day start

Course length

Ongoing

Time to results

4–12 weeks

12–16 weeks

Main side effect

Nausea and tiredness the day after

Diarrhea and nausea early on

Blood tests

Required

None

Pregnancy

Never

Check with your clinician

Cost

Low; generic available

High; generic arriving

What it treats

Compare uses by strength of evidence. Evidence level describes confidence in a benefit, not its size.

Evidence level

Methotrexate

Otezla

Strong evidenceMost established uses

Two thick, sharply bordered plaques on a knee on fair light skin. They are salmon-pink to red with loose silvery-white scale on top.

Psoriasis

Clears moderate to severe plaques.

Psoriasis

Improves moderate plaque psoriasis.

Psoriatic Arthritis

Eases joint pain and swelling.

Moderate evidenceSome supportive research

Psoriatic Arthritis

Reduces joint symptoms.

Eczema

An option for severe eczema.

Parted hair on fair scalp skin showing a raised salmon-pink plaque topped with dry silvery-white scale, with a sharply drawn border against normal skin.

Scalp Psoriasis

Approved for scalp involvement.

Little evidence

Alopecia Areata

Mixed results in small studies.

Eczema

Trials in eczema were disappointing.

Not effective

Acne

No role in acne.

Alopecia Areata

Not effective in trials.

How it works

Methotrexate. Helps control psoriasis through several cellular effects. 1. Interferes with cell replication: Blocks folate-dependent processes used to make DNA. 2. May increase adenosine signaling: This calming messenger can limit immune-cell activity. 3. Reduces skin inflammation: Inflammatory activity and plaque buildup can decrease. — Open full-size diagram
Diagram explanation and sources
Interferes with cell replication: Blocks folate-dependent processes used to make DNA. May increase adenosine signaling: This calming messenger can limit immune-cell activity. Reduces skin inflammation: Inflammatory activity and plaque buildup can decrease.
The psoriasis mechanism is not fully established. Folate antagonism affects replication, while low-dose anti-inflammatory actions include proposed adenosine pathways supported by experimental work; their precise clinical contributions are unresolved.
Source 1 · Source 2 · Source 3 · Source 4

Otezla. Apremilast turns down inflammation inside skin. 1. Blocks PDE4: Inhibits an enzyme that breaks down cAMP. 2. Raises cAMP inside cells: Preserves a signal involved in regulating inflammation. 3. Helps inflamed skin settle: Psoriasis plaques become less inflamed. — Open full-size diagram
Diagram explanation and sources
Blocks PDE4: Inhibits an enzyme that breaks down cAMP. Raises cAMP inside cells: Preserves a signal involved in regulating inflammation. Helps inflamed skin settle: Psoriasis plaques become less inflamed.
PDE4 inhibition and increased intracellular cAMP are established. The exact link to clinical improvement is not fully defined; this is a simplified overview, not every downstream pathway.
Source 1

How you take it

Treatment plan

This drug is taken once a week. Taking it every day can cause fatal bone marrow failure. Pick one day of the week, write it down, and keep to it.

Test dose: A single small dose, often 2.5 mg to 5 mg, with blood counts checked about a week later before going further. A safety check, not the treatment dose.

Starting dose: Commonly 7.5 mg to 15 mg once weekly, adjusted for age, weight, kidney function and other illnesses. Lower in older people and in reduced kidney function.

Going up: Small steps, usually 2.5 mg to 5 mg every few weeks with blood tests in between, until the psoriasis responds or side effects set the ceiling.

Usual dose: Most people settle between 15 mg and 25 mg once weekly. Above about 15 mg tablet absorption gets unreliable, a common point to switch to the injection.

Folic acid alongside it: It reduces nausea, mouth ulcers and blood count problems. Usually a daily dose on the days you are not taking methotrexate, or one larger weekly dose on a different day. It does not stop the drug working.

Total course: No fixed course. It continues as long as it works and blood tests stay normal, which for some people is years.

Nothing about the dose depends on weight or on how severe your disease is. It is built up gradually only to give your stomach time to settle.

Starting dose: A five-day starter pack, beginning at 10 mg on day one and climbing in 10 mg steps, morning and evening doses in turn, until you reach 30 mg twice a day on day six.

Usual dose: 30 mg twice a day, about 12 hours apart.

If your kidneys are significantly impaired: The dose is halved to 30 mg once a day, and the starter pack is used differently.

Total course: No fixed course. It is taken as long as it helps, judged at about 16 weeks, and the benefit stops when the drug stops.

When to take it

Once a week, on the same day every week. Choose a day you will remember and write it somewhere visible. Some people take the whole dose at once; some split it into two portions about twelve hours apart on the same day to reduce nausea. Do not spread it across different days unless you were told to.

Take tablets with water, and with food if they upset your stomach. An evening dose means the tiredness and mild nausea happen while you are asleep.

Folic acid goes on the other days, as prescribed. It is not a substitute for a missed methotrexate dose.

With the weekly injection, keep to the same day and rotate the site.

Twice a day, roughly 12 hours apart, with or without food — food helps some people with nausea. Swallow the tablets whole; do not crush, split or chew them.

If you miss a dose

Take it as soon as you remember if it is within about two days of your usual day. If longer, skip it and take the next on your usual day. Never take two weekly doses close together to catch up, and never take a daily dose to make up for a missed week.

If you have taken more than one weekly dose, or taken it several days in a row, contact a doctor or a poison center straight away. Do not wait to see how you feel. This overdose is treatable caught early and dangerous when it is not.

Take it as soon as you remember, unless the next dose is close, in which case skip it. Never take two at once. If you have stopped for more than a few days, ask before restarting; the full dose brings the stomach side effects straight back, so the starter pack is usually repeated.

Monitoring

Methotrexate is watched by blood test, and the schedule is not optional. The problems it causes are silent until they are advanced.

Before starting: Full blood count, liver tests, kidney function, and a pregnancy test where relevant. Hepatitis B, hepatitis C, HIV and tuberculosis screening is standard, because the drug damps the immune system. A chest x-ray if there is any history of lung disease.

Early on: Blood counts and liver tests within a week or two of starting, and again after each dose increase. This is when a sudden drop in blood counts would show.

Once stable: Full blood count, liver tests and kidney function every one to three months, depending on the dose and what else you take, for as long as you are on the drug.

The liver over the long term: Years of methotrexate can scar the liver, and the risk rises with total lifetime dose, heavy alcohol use, obesity, diabetes and fatty liver disease. Biopsy used to be the check; most clinics now use a blood marker of scarring and a scan of liver stiffness.

The lungs: A rare but serious lung inflammation can occur. A new dry cough, breathlessness or fever means being seen, not waiting for the next appointment.

What to report between tests: Mouth ulcers, unexplained bruising or bleeding, sore throat or fever, dark urine, yellowing of the eyes or skin, severe nausea, any new cough or breathlessness.

The absence of blood tests is why many people choose this drug. No baseline blood count, no liver panel, no tuberculosis test, no hepatitis screen, nothing repeated. Kidney function is checked once before starting, because severe impairment halves the dose.

What replaces it is clinical monitoring, which is not lighter, only different. Weight comes first. Weight loss is common and can be substantial, with some people losing five to ten percent of their body weight. If you wanted that, it is welcome. If you are older, frail or already underweight, it is a reason to reconsider, and unexplained loss should prompt a review.

Mood is second. Depression, low mood and, rarely, suicidal thoughts have been reported and appear on the label. The risk is low, but new or worsening depression should be reported promptly, and a history of depression belongs on the record before you start.

Diarrhea and nausea are third. They usually settle within the first few weeks, but severe or persistent diarrhea is not something to push through. In older adults, and in anyone on a water tablet or a blood pressure medicine, it has caused dehydration and kidney injury.

The one scheduled checkpoint is the 16-week review of skin or joints. If nothing meaningful has changed, continuing is not useful.

When you’ll see results

Approximate windows, not promises.

● Methotrexate

● Otezla

First dose

First doseTaking it: Once a week, not daily, with folic acid on the other days. Nausea, tiredness or mouth soreness in the day or two after each dose is common early on; folic acid usually blunts it.

First doseStarting: The starter pack steps the dose up over the first week, which softens the early side effects.

Weeks 1 to 2

Weeks 1 to 2Settling in: Nothing visible in the skin yet.

Weeks 4 to 8

Weeks 4 to 8Working: Plaques thin and spread less, thickness and scale first. Joint pain from psoriatic arthritis often improves in the same window, one reason it is chosen over a skin-only treatment.

Weeks 4 to 8Working: The first visible change in the skin. Scale lifts before the redness fades.

About 3 months

About 3 monthsJudge it here: Substantial improvement is the realistic target.

Beyond 3 months

Beyond 3 monthsLong term: Where it suits, the result holds while the dose continues, with regular blood tests. Some stay on it for years.

Many months

Many monthsNails: Nail psoriasis can improve, but slowly. Nails always lag behind the skin.

Days 1 to 14

Days 1 to 14Adjusting: Loose stools, nausea and headache usually start in the first week or two and settle within a month.

Weeks 2 to 4

Weeks 2 to 4Itch: Usually the first thing to change, ahead of the plaques. Behcet's mouth ulcers settle here too, one of the faster and more reliable responses.

Weeks 12 to 16

Weeks 12 to 16Judge it here: In the trials roughly one in three people reached a 75 percent improvement. Scalp psoriasis responds better than thick body plaques, a common reason to choose it.

Weeks 16 to 24

Weeks 16 to 24Psoriatic arthritis: Joint pain, swelling and tenderness improve.

Months 3 and onward

Months 3 and onwardWeight and mood: Weight loss comes on gradually, so weigh yourself regularly rather than going by how clothes feel. Mood changes are uncommon but worth watching.

Months 6 and beyond

Months 6 and beyondNails: The slowest of all, because a nail has to grow out before improvement shows.

Side effects

Sorted by what to do about them.

Methotrexate

Otezla

Common

Nausea or tiredness the day after the dose
Mouth sores
Mild hair thinning

Common

Diarrhea and nausea in the first weeks
Headache
Weight loss

Tell your doctor

Cough or breathlessness
Fever, sore throat or unusual bruising

Tell your doctor

Ongoing weight loss

Stop and get care

Taking it daily by mistake
Yellowing skin or dark urine

Stop and get care

Low mood or thoughts of self-harm
Severe diarrhea or vomiting

Safety and who should avoid it

Pregnancy

Never

Both partners avoid conception during and for 3 months after.

Ask first

Discuss with your clinician.

Breastfeeding

Never

Not compatible.

Ask first

Discuss with your clinician.

Children

Specialist only

Used in children with monitoring.

6 and older

Approved from 6 for psoriasis.

Monitoring

Required

Blood counts, liver and kidney tests; every 3 months once stable.

None

Weight checks.

Key interactions

Check

Trimethoprim-sulfamethoxazole, NSAIDs, some antibiotics; limit alcohol.

Check

Rifampin and some anti-seizure drugs reduce it.

Other cautions

Avoid

Liver disease, heavy drinking, kidney disease, active infection.

Discuss

History of depression; kidney problems.

Cost and getting it

Getting it and cost

Generic methotrexate tablets are among the least expensive systemic treatments in dermatology. Folic acid is cheap too.

The weekly auto-injector pens cost considerably more, and coverage usually requires showing that tablets caused nausea or did not work well enough. Plain injectable vials are cheaper than the pens.

The real cost is the monitoring, repeated blood tests and periodically a liver scan or blood marker. Usually covered, but they are appointments and not optional.

Insurers frequently require a trial of methotrexate before approving a biologic, one reason it is still so often the first systemic drug tried.

Apremilast is expensive, priced far closer to the biologics than to older oral drugs such as methotrexate or acitretin.

So insurers commonly ask that cheaper options be tried first, and prior authorization is usual. The manufacturer runs a copay assistance program, which typically helps people with commercial insurance and is not available on government plans.

What it saves is indirect: no injection supplies, no screening tests, no repeated laboratory work. That does not close the gap with a generic tablet, but it is part of the comparison.

When you stop

Comes back?

Psoriasis usually returns over months.

Psoriasis usually returns over weeks to months.

Taper needed?

Usually not, but plan the next step first.

No.

After the last dose

Wait at least 3 months before trying to conceive — applies to both partners.

Stomach effects resolve quickly.

Common questions

Methotrexate:How often do I take it?

Once a week, on the same day. Never daily. Daily dosing by mistake is the most dangerous error with this drug and it has been fatal. Get medical help the same day if it happens.

Methotrexate:Why do I also have to take folic acid?

Methotrexate blocks folate, and the mouth ulcers, nausea and low blood counts come from that. Folic acid on the other days restores enough folate to reduce them without stopping the treatment working.

Methotrexate:Do I really need all the blood tests?

Yes. Liver damage and falling blood counts cause no symptoms until they are advanced. The tests are the only early warning.

Methotrexate:Can I drink alcohol?

The concern is regular drinking, not a single glass, because alcohol and methotrexate both stress the liver. Agree an actual limit with your doctor.

Methotrexate:Can I take it if I want to have a baby?

No. It must be stopped well before trying to conceive, and the advice covers both partners. It causes miscarriage and serious birth defects. Ask your own doctor how far in advance.

Methotrexate:How long before I know if it is working?

Give it about three months. First changes often show at four to eight weeks, but three months on a tolerated dose is the fair point to judge.

Methotrexate:Is it chemotherapy?

It is chemotherapy at much higher doses. At psoriasis doses it acts as an immune-calming drug, and the experience is not comparable.

Otezla:Do I really need no blood tests?

Correct. No monitoring schedule, no tuberculosis screen, no repeated bloodwork. Kidney function is checked once before starting, because severe impairment halves the dose.

Otezla:Will the diarrhea stop?

For most people it is worst in the first two weeks and settles within a month, which is what the five-day starter pack softens. Diarrhea that is severe or lasts past a month is a reason to be reviewed.

Otezla:Will I lose weight?

Some people do, and some of them lose five to ten percent of their body weight. It happens gradually, so weigh yourself every few weeks rather than judging by how clothes fit.

Otezla:How does it compare with the injections?

Less effective for thick plaques — about one in three reached a seventy-five percent improvement at 16 weeks, where biologics reach much higher figures. What it offers is a tablet, no needles, no screening, no monitoring.

Otezla:Can it affect my mood?

Low mood and depression are uncommon but on the label, and rare reports of suicidal thoughts exist. Report any new or worsening low mood promptly.

Otezla:How long until I know whether it is working?

About 16 weeks for the skin, up to 24 weeks for joints. If nothing meaningful has changed, continuing is not worthwhile.

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