Corticosteroids and risk of gastrointestinal bleeding: a systematic review and meta-analysis.
I came across this when I had need to look for info on the matter re OH having some problems as well as his PMR/GCA and daughter plus her OH were anxious.
It's on the BMJ open website and also PubMed.
bmjopen.bmj.com/content/4/5...
ncbi.nlm.nih.gov/pubmed/248...
Quoting the conclusions (admittedly from 6 years and other trials since may have proved otherwise, but I haven't found any)
Conclusions
Corticosteroid use was associated with increased risk of gastrointestinal bleeding and perforation. The increased risk was statistically significant for hospitalised patients only. For patients in ambulatory care, the total occurrence of bleeding or perforation was very low, and the increased risk was not statistically significant.