Generalized Plaque Psoriasis in Adults When NB-UVB Phototherapy as Monotherapy Has Not Achieved Adequate Clearance
Clinical Scenario
This protocol applies to adults aged 18 years or older with generalized plaque psoriasis who have undergone NB-UVB phototherapy as monotherapy but have not reached the required level of skin improvement.
NB-UVB (311–313 nm wavelengths) is a first-line phototherapy approach recommended for adults with plaque psoriasis. When used as monotherapy and the response is insufficient, a structured next step is indicated.
Why This Protocol Is Reached — Prior Treatment Failure
The preceding line — NB-UVB phototherapy as monotherapy, administered 3 sessions per week — did not achieve the required clinical targets:
PASI 75 not reached
Skin clearance not achieved
Failure to meet these thresholds with monotherapy triggers escalation to a combination approach.
Next-Step Treatment Approach
The structured protocol specifies combination therapy — NB-UVB phototherapy continued 3 times weekly, now paired with a systemic or topical adjunct. The choice of adjunct depends on individual patient factors and is detailed in the full protocol.
The clinical targets at this stage are:
PASI 75 — 75% improvement in PASI score
PASI 90 — 90% improvement in PASI score
References
DOI: 10.1016/j.jaad.2019.04.042
- NB-UVB refers to wavelengths ranging from 311 to 313 nm, which are widely used for the treatment of generalized plaque psoriasis.
- NB-UVB phototherapy is recommended for adults with plaque psoriasis as monotherapy.
- Combination therapy with oral retinoids and NB-UVB phototherapy is recommended for appropriate patients with generalized plaque psoriasis who do not respond adequately to monotherapy.
- Concomitant topical therapy with vitamin D analogues, retinoids, and corticosteroids during NB-UVB phototherapy can be used safely with a potential to improve efficacy.
- Combination therapy with apremilast and NB-UVB phototherapy can be considered for adult patients with generalized plaque psoriasis who do not respond adequately to monotherapy.
- Combination treatment with NB-UVB and certain biologics is also supported by the literature and recommended for cases in which monotherapy with either treatment modality is inadequate.
View source ↗