Researchers say the inhibitors — which combat proteins that help cancer cells repair themselves — could transform the way the disease is treated.
One of the drugs, olaparib, was given the green light after research partly funded by our Raise a Ton with The Sun campaign, where kind-hearted readers sent in £100 donations.
Backed by King Charles and celebs including Denise van Outen and Ronan Keating, it was launched in 2000 and helped to raise £650,000.
Olaparib is already used to treat ovarian, prostate and early stage breast cancer. Now, it is set to be used to battle the most common form of breast cancer — along with leukaemia and skin cancer.
It could help 10,000 or so patients if findings from the latest research comparing 80 drugs are confirmed.
Dr Simon Vincent, of the charity Breast Cancer Now, said: “It’s incredibly exciting that even more patients could benefit.”