Hi Amanda, unfortunately I'm hearing this kind of thing a lot  (I created a post about it not long ago- feel free to read it if you want).  I belong to a facebook page called 'Caring for Husbands with Cancer' (my husband was diagnosed with non Hodgkin's lymphoma in 2011) and this seems to be a common problem.  It can be the medication people are on, it can also just be a destructive way of dealing with the understandable stress, anxiety and grief of having cancer.  I also think it would be helpful for your friend to discuss it with her husband's doctor, because if the medication is causing the problem it's relatively easy to fix, and either way your friend and her husband need some clinical support for this situation.  I can also recommend the facebook page 'Caring for husbands with Cancer' to your friend, too- it has over 1000 members, so it's very 'active' and you get some great support and understanding from other women in the same situation.     Your friends are also lucky to have someone like you looking out for them- having a spouse with cancer can be very lonely, and any type of interest or support from friends is extremely valuable.  Please let me know how they get on.  love and hugs, Emily ... View more