Initial dose for psoriasis |
Plaque thickness | Induration score | Fitzpatrick skin type I-III (dose in mJ/cm2) | Fitzpatrick skin type IV-VI (dose in mJ/cm2) |
None | 0 | | |
Mild | 1 | 300 | 400 |
Moderate | 2 | 500 | 600 |
Severe | 3 | 700 | 900 |
Dose for subsequent treatments |
No effect | Minimal effect | Good effect | Considerable improvement | Moderate/severe erythema |
No erythema at 12 to 24 hours and no plaque improvement | Slight erythema at 12 to 24 hours but no significant improvement | Mild to moderate erythema response 12 to 24 hours | Significant improvement with plaque thinning or reduced scaliness or pigmentation occurred | With or without blistering |
Increase dose by 25% | Increase dose by 15% | Maintain dose | Maintain dose or reduce dose by 15% | Reduce dose by 25% (treat around blistered area, do not treat blistered area until it heals or crust disappears) |