How many tubes of durvalumab/infinifer should be used at one time?

One issue that has been widely discussed in China for Durvalumab/Infinifer is how many pills are needed for one use. Because it is an intravenous infusion of immunotherapy, patients often pay attention to the dose of a single treatment, the amount of medicine that needs to be prepared, and the hospital's dispensing method before treatment. According to the international common administration method, durvalumab is mainly administered in a fixed dose or according to body weight. "How many tubes" is a relatively colloquial question, which actually depends on the content specifications of each tube and the total dose that should be used in a single time. What is common in overseas markets is fixed-concentration vial packaging. The hospital will prepare a bag of infusion according to the dosage prescribed by the doctor. Therefore, the clinical unit is not based on "a few tubes", but the number of specifications required by the pharmacy based on the total dosage conversion, and then uniformly prepared in the infusion bag.

From the patient's perspective, how many tubes to use at one time is usually related to three points: The first is whether the personal treatment plan adopts a fixed dose model. For example, some indications will use a fixed dose. In this case, only a fixed quantity may be needed each time. The second is the difference in weight. If the doctor calculates the dosage based on weight, the pharmacy will decide how many bottles of liquid medicine are needed to complete the dosage based on the patient's weight. Therefore, the number of bottles varies significantly between different patients. The third is that the indications are different, and the administration cycles and dosages are different for different cancer types. For example, the plans for non-small cell lung cancer, cholangiocarcinoma, bladder cancer, etc. have their own characteristics.

Patients need to be reminded that international guidelines emphasize that durvalumab must be uniformly distributed by medical institutions. It is not suitable for self-calculation, nor should it be used as a reference"How many tubes have been used by others". The hospital pharmacy will accurately prepare the medicine according to the doctor's prescription to avoid waste while ensuring safe and stable drug concentration and infusion time. Patients should pay more attention to whether the treatment cycle is on time, how well the infusion is tolerated, and whether immune-related adverse reactions are managed in a timely manner.

Reference materials:https://www.imfinzi.com/