MRNA COVID-19 vaccine

Name: MRNA COVID-19 vaccine

What should you tell the person who is giving the vaccine?

Tell your vaccine provider about all of your medical conditions, including if you:

  • have any allergies.
  • have a fever.
  • have a bleeding disorder or are on a blood thinner such as warfarin (Coumadin, Jantoven).
  • have a weakened immune system or are on a medicine that affects your immune system.
  • are pregnant or plan to become pregnant.
  • are breastfeeding.
  • have received another COVID-19 vaccine.
  • have had a severe allergic reaction after a previous dose of this vaccine.
  • have had a serious allergic reaction to any ingredient in this vaccine.

What are the risks of the Moderna COVID-19 vaccine?

Side effects that have been reported with the Moderna COVID-19 vaccine include:

  • injection site pain, swelling, and redness
  • tenderness and swelling of lymph nodes (in the same arm where you got the injection)
  • tiredness
  • headache
  • muscle pain
  • joint pain
  • chills
  • nausea
  • vomiting
  • fever

There is a remote chance that the Moderna COVID-19 vaccine could cause a severe allergic reaction. A severe allergic reaction would usually occur within a few minutes to one hour after getting a dose of the Moderna COVID-19 vaccine.

Signs of a severe allergic reaction can include:

  • difficulty breathing
  • swelling of your face and throat
  • a fast heartbeat
  • a bad rash all over your body
  • dizziness and weakness

These may not be all the possible side effects of the Moderna COVID-19 vaccine. Serious and unexpected side effects may occur. Moderna COVID-19 vaccine is still being studied in clinical trials.

Where will my vaccination information be recorded?

The vaccination provider may include your vaccination information in your state/local jurisdiction's Immunization Information System (IIS) or other designated system. This will ensure that you receive the same vaccine when you return for the second dose. For more information about IISs visit:

How can I learn more?

  • Ask the vaccination provider.
  • Visit CDC at
  • Visit FDA at
  • Contact your local or state public health department.

The Countermeasures Injury Compensation Program

The Countermeasures Injury Compensation Program (CICP) is a federal program that may help pay for costs of medical care and other specific expenses of certain people who have been seriously injured by certain medicines or vaccines, including this vaccine. Generally, a claim must be submitted to the CICP within one year from the date of receiving the vaccine. To learn more about this program, visit or call 1-855-266-2427.

The American Society of Health-System Pharmacists, Inc. represents that this information about the Moderna COVID-19 vaccine was formulated with a reasonable standard of care, and in conformity with professional standards in the field. Readers are cautioned that the Moderna COVID-19 vaccine is not an approved vaccine for coronavirus disease 2019 (COVID-19) caused by SARS-CoV-2, but rather, is being investigated for and is currently available under an FDA emergency use authorization (EUA) to prevent COVID-19 people 18 years of age and older. The American Society of Health-System Pharmacists, Inc. makes no representations or warranties, express or implied, including, but not limited to, any implied warranty of merchantability and/or fitness for a particular purpose, with respect to the information, and specifically disclaims all such warranties. Readers of the information about the Moderna COVID-19 vaccine are advised that ASHP is not responsible for the continued currency of the information, for any errors or omissions, and/or for any consequences arising from the use of this information. Readers are advised that decisions regarding drug therapy are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and the information contained in this information is provided for informational purposes only. The American Society of Health-System Pharmacists, Inc. does not endorse or recommend the use of any drug. This information about the Moderna COVID-19 vaccine is not to be considered individual patient advice. Because of the changing nature of drug information, you are advised to consult with your physician or pharmacist about specific clinical use of any and all medications.