Pain in the arm where the vaccine was given, headache, fatigue and even fever can be side effects of those who have received the Pfizer vaccine.
As more doses of the immunizing agent arrive in the country, there have been more reports of reactions to the vaccine. However, they are common and even expected side effects.
It is indicated that although it is unpleasant, the reactions are much less and can not be compared with the symptoms of infection with the disease.
The only safe Pfizer vaccine is approved for use in adolescents between 12 and 17 years of age, as well as pregnant women.
Related: All about the Pfizer vaccine and its effectiveness
How does the Pfizer vaccine work?
The Pfizer vaccine is based on messenger RNA, which means that it carries the genetically modified RNA of the virus to generate a protein that safely produces an immune response upon contact with our body.
“Favorite” by Brazilians for giving less feedback than other immunizing agents, Pfizer also has greater approval for use throughout Brazil, allowing entry for tourists who have been vaccinated with it.
High-potency Phase 3 studies indicate that the Pfizer vaccine is 95% effective seven days after the second dose is given.
What are the interactions of Pfizer vaccine?
Interactions are categorized, according to the package insert, into very common, common, uncommon, rare, and unknown. See all symptoms below:
Very common reactions, that is, those that occur in 10% of patients after taking the Pfizer vaccine, are:
Such symptoms are not very different from reactions that appear with other immune systems, and usually appear a few hours after the application of the vaccine.
It is important to note that the immunizing agent can cause an effect similar to the common cold, which is nothing more than that your body forms an immune response to the virus.
Common Reactions – Pfizer Side Effects
Common reactions are those that occur in 1% to 10% of patients. According to the package insert, the symptoms are:
- Redness at the injection site
- Vomiting and nausea
Unusual reactions – Pfizer side effects
Among the reactions considered uncommon, those occurring between 0.1% and 1%, the following effects:
- Enlarged lymph nodes, the so-called tongues
- hypersensitivity reactions
- Skin lesions, itching and urticaria
- Angioedema, which is a swelling of the skin.
- insomnia
- Itching at the site of application of the immunizing agent.
Rare reactions – side effects of Pfizer
When registering between 0.01% and 0.1% of patients, the Pfizer vaccine can, in very rare cases, give symptoms:
Acute facial paralysis
As an unknown reaction, when it was not even possible to estimate the data, there was a severe allergic reaction, called anaphylaxis.
Myocarditis, an inflammation of the heart muscle, and pericarditis, an inflammation of the outer “lining” of the heart, have also been reported. The chance of these side effects occurring is very low and the recommendation is to seek urgent medical attention.
When should I see a doctor?
The side effects of the fortifying agent may appear soon after application or after 48 hours, and should last for a few days. If you have mild symptoms that persist, you should seek medical attention.
The Ministry of Health recommended that four days after the onset of symptoms, a person goes to the health center closest to their home.
However, if the reactions are more severe, the thrust is to seek urgent care.
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