Was the same for me -@Hopes_and_Dreams walked past the Femara for several days and just kept the Prolia in the fridge for a week then garnered courage started both.Been on both 3 weeks - noticed joint aches I didn't have before after sitting down for a while but fine once I start moving.A talk with my GP about Prolia was very helpful - he said there were side effects with Femara but that Prolia would be fine. Have yet to bay at the moon and my husband has not taken up residence in the shed so thus far is ok.Will say however am still nervous as am osteoporotic at the outset and Femara thins bones - hopefully Prolia will prevent fractures.