The Derms on Drugs Bust Myths and Make Life Easier for Derms This Week

Big news on TB Tests for psoriasis patients on biologics! New official recommendations say not necessary for IL-17s and IL-23s.  Literally zero cases.  Ever.  
Think nicotinamide prevents skin cancer?  Think again.  Not saying it doesn't, but turns out data isn't really there and the jury is still out. 
How safe are topical steroids?  Depends.  Depends what else you're taking, especially NSAIDS - turns out it may increase your risk of an upper GI pretty substantially.
If somebody doesn't respond adequately to Dupixent, what happens if you switch them to Rinvoq?  Abbvie kind of answered the question, but not really.
Just how well does Rhapsido work in CSU?  And does it actually cause bleeding? No, no it does not.  But we're understanding more and more about why it causes petechiae.  
Are PDE4 inhibitors like apremilast and roflumilast effective for bullous pemphigoid?  Maybe.  
Do Sotyktu (and the new TYK2 inhibitors coming soon) work for atopic dermatitis?  We got our first data and it looks like they are pretty great.