Conflicts of interest: Neither author has any conflicts to declare.
Pharmacology and Therapeutics
Practical pearls in phototherapy
Article first published online: 15 MAY 2013
© 2013 The International Society of Dermatology
International Journal of Dermatology
Volume 52, Issue 11, pages 1395–1397, November 2013
How to Cite
Tsui, C. L. and Levitt, J. (2013), Practical pearls in phototherapy. International Journal of Dermatology, 52: 1395–1397. doi: 10.1111/j.1365-4632.2012.05835.x
- Issue published online: 25 OCT 2013
- Article first published online: 15 MAY 2013
The following tips are suggested for phototherapy: (i) calibrate the unit with a radiometer every 2–4 weeks; (ii) change all bulbs at the same time every 8–10 months for regularly used machines or when the UV meter shows that the power has reached 3 or 4 mW/cm2; (iii) avoid phototherapy sessions on consecutive days to prevent burn on burn; (iv) in the event of a burn, reduce the last PUVA or UVB dose by 50%, reinitiating when erythema has fully disappeared, which might take two days to two weeks; (v) nausea from oral psoralens can be avoided by taking it with a fixed amount of milk or food, taking an antiemetic with this meal prior to dosing, taking five ginger tablets 15 minutes before dosing, or dividing the dosage; (vi) to achieve 0.03% concentration of 8-methoxypsoralen for hand and foot soak PUVA, dissolve a 10-mg tablet or 1.0 cc of Oxsoralen® solution 1% in 3 l of water; and (vii) to achieve 0.000075% concentration of 8-methoxypsoralen for full-body soak PUVA, dissolve 60 mg 8-methoxypsoralen in 80 l of water (i.e. a bath tub).