Cancer treatment is often viewed as months of painful chemotherapy, radiotherapy, and surgeries that one might physically recover from but may continue to struggle with the trauma of for years. But now, thanks to a new injectable drug, cancer treatment may speed up for thousands of NHS patients in the UK. Pembrolizumab, also known as Keytruda, is that one-minute cancer drug injection that will likely speed up cancer treatment for thousands of patients—and soon, it will be available as a quicker jab instead of a half-hour drug.What is pembrolizumab?Pembrolizumab is an injectable drug prescribed to over 14,000 people in Britain every year. It works by stimulating the immune system to attack cancer cells on its own. Patients usually spend about two hours at a clinic when it is slowly administered for 30 minutes or more via a drip or IV line. However, this one-minute jab is now available in an injectable form and can be administered every three weeks or as a two-minute injection every six weeks.The drug has now been made more concentrated, with an extra component added to help the body absorb it faster. This shot is given in the stomach or the thigh instead of being infused through a vein in the arm. Doctors say that this rapid jab, which takes less than a minute to deliver, can help patients get back to their lives without having to spend hours in a hospital chair; for a cancer patient, regular hospital trips and multiple rounds of therapy can be physically exhausting and mentally draining.How will pembrolizumab benefit cancer patients?Pembrolizumab, according to doctors, will make cancer therapy and treatment more convenient for patients, and it can also bring down waiting times. It is one of the most successful cancer drugs and has been celebrated as a game-changer in treating several tumour types. The NHS uses the drug to treat 14 types of cancer, such as lung, breast, bowel, womb, stomach, head and neck, and melanoma.The first-ever patient to receive pembrolizumab was Shirley Xerxes, 89, from St Albans, Hertfordshire, who was suffering from bowel cancer. She spoke several times about how it changed her will to live and how little time it took.How does pembrolizumab work?Pembrolizumab tells the immune system to recognise and kill cancer cells. It can fight head and neck, lung, breast, and cervical cancer. The drug is administered every three weeks as a one-minute injection, or it is given every six weeks as a two-minute injection, depending on the cancer type.