hi eveyone  new to this so hope am doing it right

My hubby had a bowel opertion and found that he had 2 tumours  which they removed ,but they also saw 2 small 1cm on the liver  Today they said they wood start him on pembrolizumab immunotherapy  one every 3 weeks and then scan at 3 months

I have been trying to find ut about this treatment and asking if anyone has been on it, i googed reviews and they are mixed and now am worried sick

They didnt mention chemo or any other treatment, btu said that this is a good treatment as only 5% of ppl can have it 

has anyone been getting this treatment

i wenti nto a site drug,s,com to read reviews and i now feel like asking them to give him someone else as some ppl said its killed they hubby and alot of  1 stars

Any help wood be great  amd truth am scared now  and i have very high axienty so this is not helping any  my heart is in my stomach 

Sorry for the rant ..