Dexamethasone may decrease levels of drugs that are broken down by liver enzymes. Examples include abiraterone, apixaban (Elquis), aripiprazole ( Abilify ), boceprevir ( Victrelis ), dronedarone (Multaq), and quetiapine ( Seroquel , Seroquel XR ) . Consider increasing the dose of the drug or avoiding this combination altogether. Adverse effects, such as bone marrow suppression, are enhanced when dexamethasone is used with other immunosuppressants such as leflunomide ( Arava ) and tacrolimus ( Prograf ). Dosing schedules should be evaluated and alternative therapies should be considered. Live vaccines should also be avoided because dexamethasone reduces immune function.
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Many years ago there was a product available that worked very well to relieve the effects of poison ivy rash. It was even issued to linemen working for the telephone company. It’s name was AntIvy, and one of the active ingredients was a zirconium compound. It also had an antihistamine in the mix. I see that it was discontinued because apparently in some cases it was reported to have caused some sort of skin irritation. Poison ivy rash IS a skin irritation. Anyway, I obtained some zirconium oxide and made up my own poison ivy lotion and for me, at least, it works. It isn’t an instant remedy but it helps quite a bit. AntIvy lotion worked for many other people too. I do not understand just why your advice specifically warns against it.