Hi SMD,
Thank you for your comment. Please go to the Trelogy website for more information. However, this may be interesting to you:

What should I know before starting TRELEGY?
Before using TRELEGY, tell your healthcare provider about all of your medical conditions, including if you have:

heart problems; high blood pressure; seizures; thyroid problems; diabetes; liver problems; weak bones (osteoporosis); an immune system problem; eye problems such as glaucoma, increased pressure in your eye, cataracts, blurred vision, or other changes in vision. TRELEGY may make your glaucoma worse.
or if you:

are allergic to milk proteins.
have prostate or bladder problems, or problems passing urine. TRELEGY may make these problems worse.
have any type of viral, bacterial, parasitic, or fungal infection.
are exposed to chickenpox or measles.
are pregnant or plan to become pregnant. It is not known if TRELEGY may harm your unborn baby.
are breastfeeding or plan to breastfeed. It is not known if the medicines in TRELEGY pass into your breast milk and if they can harm your baby.

I was prescribed Trelegy a long time ago - but I am allergic to milk, and could not take it. It is always good to check online for all drug interactions.
I usually check all the medications and interactions on Web MD Interactions site - just to be double sure they don't work against each other, are toxic together, etc.
Good luck. Pam