Thanks for posting,
Betacorton has the active ingredient salicylic acid/Halcinonid which is used as the treatment of choice for psoriasis
. Alternative treatment of psoriasis will be based on the following topical creams/lotions/solutions which are steroid-based creams (e.g hydrocortisone
(vitamin D related and proven to be effective treatment), Coal-tar ointments
and shampoos, Coal-tar ointments and shampoos etc Unfortunately most of them are prescription medications but you can get steroid-based creams OTC.
I do how ever suggest that you see a dermatologist
for opinion before you can continue with treatment as there can be up to date treatment options for psoriasis that the son's previous might not be aware of.
Hope this helps