In assessing the side effects of the drug, the following frequency data was the basis:
Very often - ≥10%
Often - from 1 to 10%
Occasionally, from 0.1 to 1%
Rarely, from 0.01 to 0.1%
Very rarely - <0.01%, including isolated cases
Based on data from clinical trials and clinical use of the vaccine, the following information was obtained on the incidence of side effects:
Local reactions in the field of injection
Very often: passing pain in the area of injection.
Often: redness, swelling.
Very rarely: granuloma at the injection site, in exceptional cases with the formation of a tumor-like accumulation of serum in the tissues.
Systemic reactions
Very often: general malaise.
Often: influenza-like symptoms (sweating, chills), most often after the first vaccination, an increase in body temperature> 38 ° C.
Gastrointestinal tract
Often: nausea.
Rarely: vomiting.
Very rarely: diarrhea.
Muscles and Joints
Very often: myalgia.
Often: arthralgia.
Very rarely: arthralgia and myalgia in the occiput.
Circulatory and lymphatic system
Very rarely: lymphadenopathy.
Nervous system
Very often: headache.
Very rarely: paresthesia (eg, itching, numbness of the limbs).
The immune system
Very rarely: allergic reactions (generalized allergic rash, swelling of the mucous membranes, laryngeal edema, dyspnoea, bronchospasm, hypotension) and transient thrombocytopenia.
Flu-like symptoms occur more often after the first vaccination and usually go through 72 hours. If necessary, anti-inflammatory therapeutic agents are recommended.
Arthralgia and myalgia in the neck can represent a picture of meningism. Such symptoms are rare and disappear within a few days without consequences.
In clinical trials, two cases of glioblastoma emerged.
The frequency of occurrence of this phenomenon in clinical studies was higher than the expected initial generalpopulation frequency described in the literature. However, there was no increase in the incidence of these phenomena during post-marketing surveillance, and the cause-and-effect relationship with the use of the Encepur® adult vaccine was not established.
There were reports that, in isolated cases after vaccination against CE, there were diseases of the central and peripheral nervous system, including ascending paralysis (Guillain-Barre syndrome).