Moderna vaccine is safe and effective when used by your doctor’s directions. However, it does have some side effects that you should be aware of before getting the vaccine. These include nausea, diarrhoea, and muscle aches.
Though these are common reactions to vaccinations, they do not happen to everyone and can be managed with medication if needed. If you have more severe reactions like swelling in your throat or trouble breathing, get medical attention immediately as they could be life-threatening.
1. Increased Hemorrhage
Haemorrhaging after receiving a vaccination is incredibly rare, and a side effect that has been attributed to only one FDA-approved drug (Roux-en-Y gastric bypass). Some people report that receiving certain vaccinations causes them to bleed more frequently—particularly vaccinations against MMR and HPV.
As a precaution, it’s important to monitor yourself for excessive bleeding after receiving any type of immunization.
2. Pregnant women should not take it
Before you get a flu shot, you’ll need to weigh some important considerations. The first thing to note is that pregnant women should not take it. This is because certain ingredients in vaccines, such as egg protein and gelatin, could potentially cause allergic reactions.
Flu shots also do not contain mercury, which is a common ingredient in over-the-counter flu remedies. For these reasons, your doctor will likely advise against getting a vaccination while pregnant or breastfeeding.
3. Painful Episodes in Joints
Injections with Moderna vaccines can sometimes cause painful episodes in joints. The joint pain occurs some time after receiving a vaccination, is typically mild, and goes away on its own.
The pain may last up to two weeks but it is rare for these episodes to be more severe or longer-lasting than that. In cases where joint pain continues after two weeks, patients are advised to consult their healthcare provider immediately. These symptoms should never be treated with medication without consulting a doctor first.
4. Flu-like Symptoms
The most common side effect associated with a flu shot is called flu-like symptoms, and it can occur within 24 hours of receiving a flu shot. Flu-like symptoms include: feeling weak, fever, aches and pains in muscles, joints or bones.
These side effects usually don’t last long and get better on their own within a few days. The flu shot also can cause mild redness and soreness at the injection site (depending on where you get your shot). Occasionally, people may have other reactions to flu shots—these can be serious but are rare.
5. Loss of Appetite
New research is uncovering that vaccines—particularly one for pneumococcal disease—are causing new, unexpected side effects. Pneumococcal disease refers to a range of infections caused by bacteria in the lungs and blood.
These include pneumonia and bloodstream infections (bacteremia). Researchers looked at reports submitted to the U.S. Centers for Disease Control and Prevention between 2001 and 2013 as part of VAERS, or Vaccine Adverse Event Reporting System.
6. Mood Swings
Most of those who get a modern shot experience flu-like symptoms, but some also develop mood swings. Headaches, nervousness, and even aggressive behaviour have been reported in as many as 15% of patients within a week or two after getting vaccinated.
This might not be more than an inconvenience to some people, but for others, it could affect their work and personal relationships. If you think you’re experiencing side effects from your current vaccination, speak with your doctor about possible alternatives.
7. Skin Issues
Since vaccines contain a small amount of dead or live viruses, it’s possible that you could experience mild reactions at injection sites. These include pain, redness, swelling, itching, and irritation. They usually disappear quickly but may last for up to two weeks.
To help alleviate these side effects, keep your skin well hydrated with lotion and wash regularly with mild soap and water. If your skin starts to become dry or scaly or begins to peel during that time frame, contact your healthcare provider right away.