On herceptin and perjeta , stage 4 , itchy skin and now itchy scalp -anyone treated itch sucessfully

Update - saw the oncologist today .she said that perjeta sites don’t report itchy skin issues as side effects BUT she’s now hearing from various patients about it . Nurse practioner friend mentioned to,me a topical corticosteroid lotion called Novasone , so oncologist wrote out a prescription for me to,try .suggested applying nightly ( will probably mean I’ll,have to wash hair daily again but …..) . She suggested stopping use if itchiness stops . I’ll report back in a few weeks