The trouble with Femara is the cost, it is not a generic but the original Letrozole and was about £70 a box when I was on it about 4 years ago. I had to go on to the generics as they are a fraction of the price and unless your GP will prescribe or your Onc insists that Femara is prescribed to you you won't get it.
The difference is in the coating of the cheaper generics. I was reasonably OK on Femara but have only had the major SEs since being on the generic version.
i thought I would just add my experience to the discussion. I'm about to finish letrozole after just over two years. I tried three different generic brands at first, including Teva, and had excrutiating joint pains, to the point where I could barely walk in the morning. After reading a lot of comments by other women who had taken letrozole, I asked my GP to prescribe Femara rather than a generic brand, and the difference in my joint pains and other side effects was really dramatic, and was almost immediate. My oncologist has told me that she regularly sees patients who have had exactly the same experience as me, and whilst my pharmacist tells me that the formulation used in Femara is the same as other brands, my oncologist said that she always suggests that women shoudl try Femara if they are experiencing serious side effects.
I have been on Letrozole for 5 years(now about to stop after 5 years of Tamoxifen) and to begin with was on Femara then once the generics became available had to go on to those.
Tried various ones, compared the ingredients and found that Teva suited me best. I was dx with Burning Mouth Syndrome which started about 6 months after starting Letrozole, have got the aches and pains which resulted in a full body scan as my Onc was concerned that the cancer had come back, all clear thank goodness. Up till this point my Onc wouldn't hear of the SEs of the drug but did eventually agree that it could be due to the drug.
Anyway my pharmacist has never had a problem getting Teva, I live in the east of england, don't know if that makes a difference. Do you think that your pharmacies only stock the cheapist generic and thats why you are having problems.
My Onc did say to me that he has had to write to some GPs asking them to make sure that where his patients are having problems with generics and SEs they should prescribe Femara because we have enough to put up with without the extra SEs that these generics have(whether this happened I don't know!)
I hope you manage to get hold of Teva.