Common H1N1 Vaccine Side Effects

H1N1 vaccine is available in various clinics and dispensaries in mainly three forms:

-nasal spray

-multi-shot vials

-shots in a syringe

There are certain H1N1vaccine side effects which can occur after receiving the H1N1 vaccine. Some of the side effects are discussed below:

Like any other vaccine, the side effects of H1N1 can vary from some being mild in nature and some being severe. Severe side effects are usually seen in the form of a severe rash or allergy. Death is usually an unusual cause and is not seen to occur very commonly.


Mild H1N1 side effects which are seen are as follows:

(These mild forms of side effects usually last for about 2 days after the H1N1 vaccine is taken. The side effects can start from when the shot was taken.)

-there can be a presence of swelling in the area where the shot was given. Swelling is generally associated with redness and the area becomes sore.

-there can be mild fever after receiving the vaccine.

-some people complain of aches, they develop cough, hoarseness.

-itchy and watery eyes are sometimes seen.

-lymph node swelling

-diarrhea is seen to occur in some individuals.


Moderate forms of H1N1vaccine side effects are as follows:

-some people complain of dizziness, vomiting and feeling extremely weak

-stomach pain occurs at times along with inability to sleep

-numbness and tingling sensation occurs in the hands and feet.

-muscle stiffness, body ache, spasms, pain which is felt especially in the neck and the back area.

-mild form of rash which is accompanied with itching is seen in some.

-rarely there is pain along with slight heaviness in the chest which results in difficulty in breathing is seen to occur.


Severe forms of H1N1 vaccine side effects are as follows:

Severe side effects of H1N1 are not common. If they occur at all, they occur very rarely. The symptoms of which may start almost immediately after the shot was taken or at the most after a couple of hours.

-The severe forms of side effects are usually presented in the form of a severe allergic reaction. When an individual suffers from an allergic reaction there is sometimes a fear of the person going into a state of shock. This occurs when there is a sudden drastic fall in the blood pressure. If the blood pressure is not brought to normal in time then the person enters a state of shock which is definitely a medical emergency.

-other forms of severe H1N1 vaccine side effects include the risk of a person getting fits, sudden fall in the platelet level of the body and severe pain along the nerves. All these side effects occur very rarely.

-vasculitis may occur in rare condition due to which there may be additional problems such as severe rashes, pain in the various joints of the body and kidney function problems.

-inflammation of the nerves which can cause paralysis (Guillain-Barre syndrome)

-Encephalomyelitis and other forms of neurological complications.

If symptoms of any kind are noted by the patient then their doctor should be immediately informed about this happening as in a few cases the symptoms may be severe and may need medical help.

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