- abdominal pain
- hives
- lethargy
- lymphadenopathy
- a decrease in appetite
- dizziness
- drowsiness
- hyperhidrosis
- an itch
- a skin rash
- muscle spasms
Rare side effects (≥ 1/10,000 to ≤ 1/1,000):
- facial paralysis
Very rare side effects (≤ 1/10,000):
- a thrombotic thrombocytopenic syndrome
- Guillain-Barré syndrome
Side effects with an undetermined frequency:
- anaphylaxis
- hypersensitivity
- capillary leaks
- angioedema
- immune thrombocytopenia
- thrombosis of the veins and cerebrovascular sinuses
AstraZeneca vaccine: what do we know about the cases of thrombosis?
In March 2021, was temporarily suspended in France following cases of thrombosis that occurred after vaccination. “Severe and very rare cases of thrombosis in association with thrombocytopenia have been reported after the vaccine was marketed. These include venous thromboses such as cerebral venous sinus thrombosis, splanchnic venous thrombosis, as well as arterial thromboses,” explained the ANSM at the time.
The European Medicines Agency (EMA) had ultimately indicated that the benefit-risk balance of the vaccine remained positive. Vaccination therefore resumed in France. In its report of January 7, the ANSM (French National Agency for Medicines and Health Products Safety) indicated that “a total of 29 cases meeting the definition of vaccine-induced immune thrombocytopenia (IVTT)” had been identified.
Janssen vaccine: what are its side effects?
is the latest addition to the Covid-19 vaccine arsenal: its administration began last April. It can be given to people over 55 and uses the same technology as the AstraZeneca vaccine: it is a viral vector vaccine that uses an adenovirus to trigger an immune response.
Like the AstraZeneca vaccine, its arrival was also marked by a suspension: its use was temporarily stopped in the United States, after cases of thrombosis.
The European Medicines Agency (EMA) had ultimately determined that the benefit-risk balance of the Janssen vaccine remained positive. However, on May 3, 2021, Denmark announced that it was discontinuing its use. In France, vaccination continues, but “the EMA concluded that thromboembolic events associated with thrombocytopenia should be considered very rare adverse effects of the Janssen vaccine .” Four cases of thrombosis associated with thrombocytopenia have been reported in France in patients in their fifties and one in their forties, according to the ANSM (French National Agency for Medicines and Health Products Safety).
As of January 27, 1,079,600 doses of the Janssen vaccine had been administered. A total of 1,345 adverse events had been reported to health authorities. Since the start of the vaccination campaign, 62% of the reported side effects were considered “non-serious” and 38% “serious.”
No new signals or events requiring monitoring were identified by the ANSM between December 31, 2021, and January 13, 2022. Confirmed signals include thrombosis associated with thrombocytopenia, capillary leak syndrome, Guillain-Barré syndrome, immune thrombocytopenia, venous thromboembolism, and transverse myelitis. Potential signals or events already under surveillance include herpes zoster, myocarditis and pericarditis, vaccine failure, Parsonage-Turner syndrome, hypertension, myelitis, and Henoch- .
The information sheet provided to healthcare professionals by the ANSM (French National Agency for Medicines and Health Products Safety) summarizing the side effects of the Janssen vaccine includes:
Very common side effects (≥1/10):
- pain at the injection site
- headaches, in other words, headaches
- nausea
- Myalgia, in other words, muscle pain
- fatigue
Common side effects (≥ 1/100 to ≤ 1/10):
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