On April 13, the FDA and CDC recommended to temporarily pause the administration of the Johnson & Johnson vaccine due to an extremely rare, adverse reaction that causes blood clots. More than 6.8 million doses of the Johnson & Johnson vaccine were administered across the U.S. and six women experienced blood clots days after receiving their vaccine. While the FDA and CDC investigate what may have caused this reaction, both agencies noted that this measure is being taken out of an abundance of caution.
With many questions still remaining, SingleCare asked its Chief Pharmacy Officer, Ramzi Yacoub, Pharm.D., to shed light on what this pause means to the public and to those who received a Johnson & Johnson vaccine in the past month.
Dr. Ramzi Yacoub: If you received a Johnson and Johnson vaccine within the last month, you should monitor your side effects over the next 21 days. Experiencing flu-like symptoms, such as fever, chills, fatigue, headache, and injection side pain are all typical side effects of the vaccine. However, if you experience shortness of breath, severe headache, and/or leg and abdominal pain, you should contact your doctor or healthcare provider immediately. To date, there have been only six cases of 6.8 million vaccinated; and those cases were reported to have affected females between the ages of 18-49. So while these side effects are extremely rare—affecting about 1 in a million—it’s worth monitoring.
Dr. Yacoub: As of now, the FDA has said this recommended pause on Johnson & Johnson vaccines is temporary, perhaps only a few days. If you have an appointment for the Johnson and Johnson vaccine that’s been canceled, check with your vaccine provider to see if they can offer you either the Moderna of Pfizer vaccine instead.
Dr. Yacoub: If you have a Johnson & Johnson appointment that hasn’t been canceled, talk with your doctor or healthcare provider. Together, you can make the determination to keep your appointment or switch to receive a different vaccine.
Dr. Yacoub: Consumers should continue to have confidence in the COVID-19 vaccines as nearly 200 million Pfizer and Moderna vaccines have been administered to date with no major side effects.
Dr. Yacoub: This reaction is extremely rare. However, if you received a Johnson & Johnson vaccine in the last 21 days, and especially if you are female between the ages of 18 to 49, you should monitor for symptoms and watch for shortness of breath, severe headache, and pain in your legs or abdominal region. If you experience any these symptoms, contact your healthcare provider immediately or seek emergency medical help.
Dr. Yacoub: Common side effects for the Johnson & Johnson vaccine include injection site pain, muscle aches, fatigue, fever, chills, nausea, and headache.
Dr. Yacoub: This is yet to be determined and is dependent on the FDA’s review of this vaccine. To date, roughly 5% of vaccines administered have been with the Johnson & Johnson vaccine. Pfizer and Moderna are both on track to meet the Biden Administration’s goal to have enough vaccines for every U.S. adult by the end of May.
Dr. Yacoub: Once the FDA has completed its review of the vaccine and it’s determined to be safe, I believe consumers should feel very confident receiving the vaccine.
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Prescription savings vary by prescription and by pharmacy, and may reach up to 80% off cash price. This is a medical discount plan. This is NOT insurance. This program offers you the opportunity to locate providers of various types of medical services who will offer their services to you at discounted rates. The range of discounts for medical or ancillary services provided under the plan will vary depending on the type of provider and service received. You are fully responsible for paying for all health care services but will be entitled to receive a discount from those health care providers in accordance with the specific pre-negotiated discounted fee schedule. This program does not guarantee the quality of the services or procedures offered by the providers. Except for prescription drugs which you will pay directly to the pharmacy at the time of purchase, all other services received through a program provider will be charged to the credit card on file in your member account. The charge will include an administrative fee for use of the program. Towers Administrators LLC is the licensed discount medical plan organization with its administrative office located at 4510 Cox Road, Suite 111, Glen Allen, VA 23060. SingleCare Services, LLC is the marketer of the discount medical plan organization including its website, singlecare.com, with its corporate office located at 99 High Street, Suite 2800, Boston, MA 02110. For additional information, including an up-to-date list of providers, or assistance with any issue related to program membership, please contact member support any time at www.singlecare.com, or by calling toll-free 844-234-3057, 24 hours, 7 days a week (except major holidays). Pharmacy names, logos, brands, and other trademarks are the property of their respective owners.
Blog articles are not medical advice. They are intended for general informational purposes and are not meant to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. If you think you may have a medical emergency, immediately call your physician or dial 911.
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© 2025 SingleCare Administrators. All rights reserved