
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. Tazarotene: A strong prescription retinoid for acne, psoriasis and sun damage. It does more than the gentler retinoids and irritates more, and it must not be used in pregnancy.


Choose for moderate psoriasis or psoriatic arthritis when you want a pill with no routine blood tests, accepting it's gentler than injections.
Choose for acne or psoriasis that needs a stronger retinoid than tretinoin or adapalene, and you can tolerate more irritation.
Can you take them together?
Tazarotene can be used on stubborn plaques while taking Otezla. They do not interact.
Compare uses by strength of evidence. Evidence level describes confidence in a benefit, not its size.











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.

Activates retinoid receptors: Skin converts it to an active form that changes gene signals. Helps unclog pores: Normalizes cell buildup inside follicles. Reduces excess skin growth: Helps psoriasis cells grow and mature more normally. Improves sun-damaged skin: Can improve fine wrinkles and uneven pigmentation.
Tazarotene is converted to tazarotenic acid, which preferentially activates RAR-beta/gamma. Full clinical mechanisms are not defined. Acne, psoriasis and photodamage evidence comes from different formulations/strengths; clinical benefits are not guaranteed.
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 Apply: At night only, on completely dry skin — about twenty minutes after washing, because damp skin absorbs more and stings more. A pea-sized amount covers the whole face. Moisturizer underneath, on top, or both. Sunscreen every morning is part of the treatment.
How to Start: Two or three nights a week for the first two to four weeks, then build toward nightly as the skin allows. Most people who quit started nightly. For thick psoriasis plaques some doctors use short contact — applied, then washed off after twenty to thirty minutes — but only if you were told to.
If It Irritates: Moisturizer before and after, drop back a night or two a week, and take two or three nights off if the skin is raw. Do not scale up other actives at the same time. Cold, wind and hot showers make it worse.
If It’s Not Working: Give it a full twelve weeks. If acne is still active, step up the strength, change to the gel, or add benzoyl peroxide or an oral option. Check first that you are treating the whole area, not dabbing spots.
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.
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.
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.
No blood tests are needed. Two things get monitored: how the skin is tolerating it, and pregnancy status.
Because tazarotene is contraindicated in pregnancy, anyone who could become pregnant should expect a conversation about reliable contraception before starting, and in some settings a pregnancy test. Very little reaches the bloodstream, but the restriction is absolute.
The other checkpoint is a review at around twelve weeks: hold the strength, step up, or add something. People stay on this for years, and nothing accumulates that needs testing.
Approximate windows, not promises.
First doseStarting: The starter pack steps the dose up over the first week, which softens the early side effects.
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 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 4 to 8Working: The first visible change in the skin. Scale lifts before the redness fades.
Weeks 4 to 8Adapting: Peeling settles and new spots get less frequent. Most quit before reaching this.
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 24Psoriatic arthritis: Joint pain, swelling and tenderness improve.
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 beyondNails: The slowest of all, because a nail has to grow out before improvement shows.
First few minutesApplying it: A pea-sized amount on dry skin at night. Mild stinging is normal.
Weeks 1 to 4The adjustment: Dryness, flaking around the nose and mouth, mild redness, peaking in weeks two to three. Acne can look worse first as forming clogs surface.
Weeks 8 to 12Judge it here for acne: Fewer new spots, fewer blackheads and whiteheads. Trials measured here, and it keeps building. Psoriasis plaques thin on the same timeline and often stay thinner after stopping.
4 to 6 monthsTexture and fine lines: Gradual smoothing. A months-to-years treatment, not a course.
6 months or moreMottled pigment and dark marks: The slowest of all. Sunscreen does as much work as the retinoid.
ThroughoutSun and flushing: Skin burns more easily, so daily sunscreen is not optional. Stinging, and a flush after alcohol or hot drinks, settle.
Sorted by what to do about them.
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.
This is the honest weak point. The lotion and the foam are brand-only and expensive, coverage is inconsistent, and prior authorization is common — plans usually want a cheaper retinoid tried first.
Generic cream and gel cost considerably less, though still more than tretinoin. Adapalene is sold without a prescription in many places and is the least expensive retinoid. If cost is the barrier, ask about generic cream or gel at 0.05%.
Correct. No monitoring schedule, no tuberculosis screen, no repeated bloodwork. Kidney function is checked once before starting, because severe impairment halves the dose.
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.
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.
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.
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.
About 16 weeks for the skin, up to 24 weeks for joints. If nothing meaningful has changed, continuing is not worthwhile.
Little for the first month, real change between weeks eight and twelve. Texture and pigment take longer.
Clogs already forming are being pushed to the surface sooner. It settles by weeks six to eight.
No. Tazarotene is contraindicated in pregnancy and should be stopped before trying to conceive. Ask your doctor what to use instead.
Generally yes, and more irritating for the same reason. Whether it works better depends on whether you can use it consistently.
Yes — about a week beforehand, and tell whoever is treating you that you use a prescription retinoid.
Yes. Unlike tretinoin, it is not broken down by benzoyl peroxide. The pair can be drying, so use one in the morning and one at night.