I don't have pancreatic cancer, but I have taken Keytruda (for endometrial cancer) and have some thoughts, some of which are fairly cynical.

Keytruda, and other related "immune checkpoint inhibitors", can be true miracle drugs in certain situations. These are mostly in cancers that have high levels of new mutations that are only in the cancer (aka somatic mutations). Examples include melanomas (mutations from sun damage), lung cancers (especially in smokers), bladder cancers, and cancers that are defective in a DNA repair activity called mismatch repair (MMR). MMR is defective in cancers of people with Lynch syndrome, as well as in many non-Lynch cancers, particularly colorectal and endometrial. However, Keytruda does sometimes still work in cancers with very low levels of new mutations. Most pancreatic cancers have low levels of mutations (listed on sequencing reports as TMB. Less than "10" is low.)

But Keytruda is also sold by a capitalist enterprise (Merck) that is seeking to maximize profit. Their goal is to put as many people on Keytruda as possible, whether or not it's going to do them any good. (My hospital sends the insurance company a $56,000 bill on days I have a Keytruda infusion, including $40,000 for the Keytruda. The insurance company sends them $17,000 in total.)

In their initial clinical trials, Merck did try to distinguish between people who would benefit from Keytruda and those who would not, but more recently they have made minimal effort in this regard. In the endometrial cancer trials, they did distinguish between MMR deficient cancers (where it works great), and MMR proficient cancers (where it works poorly, but there is a statistically significant improvement in a fraction of patients.). But they made no attempt to determine which MMR proficient patients might benefit, and the FDA has now approved Keytruda for MMR proficient endometrial cancers in combination with two different sets of drugs. These are now standard of care for recurrent MMR proficient endometrial cancers, such as mine, even though they work very poorly in the majority of these patients. I have progressed while still on the first Keytruda drug combination, but, wouldn't you know, my doctors now want me to try the second one. Merck is looking golden, however.

I haven't had any side effects from the Keytruda, but some patients do, and you should consider that as well.

Before I started taking Keytruda, I thought it was very unlikely that I would benefit (for reasons I won't go into), but I figured that there was some hope that I would, and that the risk of harm was fairly low. And I'm not the one paying $17,000 every 3 weeks. So I did it.

Is it possible for you to take Olaparib alone outside the clinical trial? Or is the trial the only way for you to get Olaparib?