Lonquex

Lonquex is available as an injection in pre-filled syringes. The injections should be given under the skin in the abdomen, upper arm or thigh. One 6-mg dose is given in each chemotherapy cycle around 24 hours after chemotherapy.

The medicine can only be obtained with a prescription and treatment should be started and supervised by a doctor experienced in treating cancer and blood disorders. Patients may be able to inject the medicine themselves once they have been properly trained but the first injection should be under the direct supervision of a doctor. For more information, see the package leaflet or contact your doctor or pharmacist.

The active substance in Lonquex, lipegfilgrastim, is similar to granulocyte colony stimulating factor (G‑
CSF), a naturally occurring protein in the body that stimulates the production of white blood cells including neutrophils in the bone marrow. Lipegfilgrastim acts in the same way as G‑CSF, increasing
the production of neutrophils and thereby helping to reduce the duration of neutropenia and the occurrence of febrile neutropenia (a sign of infection) in patients receiving chemotherapy.

Lipegfilgrastim is a form of filgrastim, which has been available in the EU for a number of years. In Lonquex, the filgrastim has been ‘pegylated’ (attached to a chemical called polyethylene glycol). This slows down the medicine’s removal from the body and allows the medicine to be given less often.

Lonquex was effective in reducing the duration of neutropenia and the number of febrile neutropenia cases among patients undergoing chemotherapy. In a main study in 202 breast cancer patients Lonquex compared well with another pegylated filgrastim: the average duration of severe neutropenia during chemotherapy was around 17 hours with Lonquex compared with around 19 hours with the other medicine.

Lonquex also compared well with the other medicine in the number of febrile neutropenia cases: 1 in the Lonquex-treated group versus 3 in the comparator group.

Another main study in 376 patients compared Lonquex with placebo (a dummy treatment). Patients receiving Lonquex recovered from neutropenia more quickly and fewer patients suffered severe neutropenia.
 

The most common side effects with Lonquex (which may affect more than 1 in 10 patients) are nausea as well as bone and muscle pain. For the full list of side effects of Lonquex, see the package leaflet.

The European Medicines Agency noted that the studies had shown that Lonquex is effective in reducing the duration of severe neutropenia and the number of febrile neutropenia cases. The side effects of the medicine were typical for this class of medicines and are considered manageable. The Agency therefore decided that Lonquex’s benefits are greater than its risks and it can be authorised for use in the EU.

Recommendations and precautions to be followed by healthcare professionals and patients for the safe and effective use of Lonquex have been included in the summary of product characteristics and the package leaflet.

As for all medicines, data on the use of Lonquex are continuously monitored. Side effects reported with Lonquex are carefully evaluated and any necessary action taken to protect patients.

Lonquex received a marketing authorisation valid throughout the EU on 25 July 2013.