The manufacturers predict that the 
serum levels of 
sirolimus will be increased by 
danazol. Note that similar predictions have proven to be true with ciclosporin (
cyclosporine) and 
tacrolimus.  
Sirolimus levels and/or effects (e.g. on 
renal function) should be monitored as a matter of routine, but it may be prudent to increase monitoring if 
danazol is started or stopped.