Comirnaty

Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 10/22/2021
Comirnaty Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

What Is Comirnaty?

Comirnaty (COVID-19 vaccine, mRNA) is a vaccine indicated for active immunization to prevent coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in individuals 16 years of age and older.

What Are Side Effects of Comirnaty?

Side effects of Comirnaty include:

  • injection site reactions (pain, swelling, redness),
  • fatigue, 
  • headache, 
  • muscle pain,
  • chills,
  • joint pain, and
  • fever.


Dosage for Comirnaty

Comirnaty is administered intramuscularly as a series of 2 doses (0.3 mL each) 3 weeks apart.

Comirnaty In Children

Safety and effectiveness of Comirnaty in individuals 16 through 17 years of age is based on safety and effectiveness data in this age group and in adults. 

The safety and effectiveness of Comirnaty in individuals younger than 16 years of age have not been established. 

What Drugs, Substances, or Supplements Interact with Comirnaty?


Comirnaty may interact with other medicines.

Tell your doctor all medications and supplements you use and all vaccines you recently received.

Comirnaty During Pregnancy and Breastfeeding

Tell your doctor if you are pregnant or plan to become pregnant before using Comirnaty; it is unknown how it might affect a fetus. There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to Comirnaty during pregnancy. Women who are vaccinated with Comirnaty during pregnancy are encouraged to enroll in the registry by visiting https://mothertobaby.org/ongoing-study/covid19-vaccines/. It is unknown if Comirnaty passes into breast milk. Consult your doctor before breastfeeding. 

Additional Information

Our Comirnaty (COVID-19 vaccine, mRNA) Suspension For Injection, For Intramuscular Use Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication. 

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Comirnaty Consumer Information

Get emergency medical help if you have signs of an allergic reaction: hives, itching; confusion, dizziness, fainting; vomiting, diarrhea; fast heartbeats, wheezing, difficult breathing; swelling of your face, lips, tongue, or throat.

An allergic reaction is more likely to occur within 30 minutes after you receive the vaccine. You will be treated quickly if you have a reaction.

You should not receive the second vaccine if the first shot caused an allergic reaction. Your healthcare provider will determine if you can safely receive the second dose.

Becoming infected with COVID-19 is much more dangerous to your health than receiving this vaccine. Serious side effects other than an allergic reaction may include:

  • pale or clammy skin, sweating, feeling warm or cold;
  • feeling anxious, nauseated, weak, or light-headed;
  • slow heartbeats, rapid breathing; or
  • changes in vision or hearing.

Fever may be a normal symptom as your body begins to develop immunity to COVID-19. However, you should call your doctor right away if you have any side effects that concern you.

Common side effects may include:

  • fever, chills, swollen glands;
  • pain, redness, or swelling where the shot was given;
  • nausea, not feeling well;
  • feeling tired; or
  • headache, muscle pain, joint pain.

You may be able to treat these effects with an over-the-counter pain reliever such as acetaminophen (Tylenol) or ibuprofen (Motrin, Advil, and others). Follow the label directions or your vaccination provider's instructions.

Other side effects, mild or serious, may occur with more widespread use of COVID-19 vaccine.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report vaccine side effects to the US Department of Health and Human Services at 1-800-822-7967.

You may also use a smartphone-based program called V-safe to communicate with the Centers for Disease Control and Prevention (CDC) about any health problems you have after receiving a COVID-19 vaccine: www.cdc.gov/vsafe.

Read the entire detailed patient monograph for Comirnaty (COVID-19 vaccine, mRNA for Injection)

Comirnaty Professional Information

SIDE EFFECTS

In clinical studies, the most commonly reported (≥10%) adverse reactions in participants 16 through 55 years of age following any dose were pain at the injection site (88.6%), fatigue (70.1%), headache (64.9%), muscle pain (45.5%), chills (41.5%), joint pain (27.5%), fever (17.8%), and injection site swelling (10.6%).

In clinical studies, the most commonly reported (≥10%) adverse reactions in participants 56 years of age and older following any dose were pain at the injection site (78.2%), fatigue (56.9%), headache, (45.9%), muscle pain (32.5%), chills (24.8%), joint pain (21.5%), injection site swelling (11.8%), fever (11.5%), and injection site redness (10.4%).

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a vaccine cannot be directly compared to rates in the clinical trials of another vaccine and may not reflect the rates observed in practice.

The safety of COMIRNATY was evaluated in participants 16 years of age and older in 2 clinical studies conducted in Germany (Study 1), United States, Argentina, Brazil, Turkey, South Africa, and Germany (Study 2). Study BNT162-01 (Study 1) was a Phase 2-part, dose-escalation trial that enrolled 60 participants, 18 through 55 years of age and 36 participants, 56 through 85 years of age. Study C4591001 (Study 2) is a Phase 1/2/3 multicenter, multinational, randomized, saline placebo-controlled, double-blinded (Phase 2/3), dose-finding, vaccine candidate-selection and efficacy study that has enrolled approximately 44,047 participants (22,026 COMIRNATY; 22,021 placebo) 16 years of age or older (including 378 and 376 participants 16 through 17 years of age in the vaccine and placebo groups, respectively). Upon issuance of the Emergency Use Authorization (December 11, 2020) for COMIRNATY, participants were unblinded to offer placebo participants COMIRNATY. Participants were unblinded in a phased manner over a period of months to offer placebo participants COMIRNATY. Study 2 also included 200 participants with confirmed stable human immunodeficiency virus (HIV) infection; HIV-positive participants are included in safety population disposition but are summarized separately in safety analyses. Confirmed stable HIV infection was defined as documented viral load <50 copies/mL and CD4 count >200 cells/mm³ within 6 months before enrollment, and on stable antiretroviral therapy for at least 6 months.

At the time of the analysis of the ongoing Study 2 with a data cut-off of March 13, 2021, there were 25,651 (58.2%) participants (13,031 COMIRNATY and 12,620 placebo) 16 years of age and older followed for ≥4 months after the second dose.

Participants 16 years and older in the reactogenicity subset were monitored for solicited local and systemic reactions and use of antipyretic medication after each vaccination in an electronic diary. Participants are being monitored for unsolicited adverse events, including serious adverse events, throughout the study [from Dose 1 through 1 month (all unsolicited adverse events) or 6 months (serious adverse events) after the last vaccination].

Demographic characteristics in Study 2 were generally similar with regard to age, gender, race, and ethnicity among participants who received COMIRNATY and those who received placebo. Overall, among the total participants who received either COMIRNATY or placebo, 50.9% were male, 49.1% were female, 79.3% were 16 through 64 years of age, 20.7% were 65 years of age and older, 82.0% were White, 9.6% were Black or African American, 25.9% were Hispanic/Latino, 4.3% were Asian, and 1.0% were American Indian or Alaska Native.

Local And Systemic Adverse Reactions Solicited In The Study 2

Table 1 and Table 2 present the frequency and severity of reported solicited local and systemic reactions, respectively, within 7 days following each dose of COMIRNATY and placebo in the subset of participants 16 through 55 years of age included in the safety population who were monitored for reactogenicity with an electronic diary.

Table 3 and Table 4 present the frequency and severity of reported solicited local and systemic reactions, respectively, within 7 days of each dose of COMIRNATY and placebo for participants 56 years of age and older.

In participants 16 through 55 years of age after receiving Dose 2, the mean duration of pain at the injection site was 2.5 days (range 1 to 70 days), for redness 2.2 days (range 1 to 9 days), and for swelling 2.1 days (range 1 to 8 days) for participants in the COMIRNATY group. In participants 56 years of age and older after receiving Dose 2, the mean duration of pain at the injection site was 2.4 days (range 1 to 36 days), for redness 3.0 days (range 1 to 34 days), and for swelling 2.6 days (range 1 to 34 days) for participants in the COMIRNATY group.

Table 1: Study 2 - Frequency and Percentages of Participants with Solicited Local Reactions, by Maximum Severity, Within 7 Days After Each Dose - Participants 16 Through 55 Years of Age - Reactogenicity Subset of the Safety Population*

COMIRNATY Dose 1
Na=2899 nb (%)
Placebo Dose 1
Na=2908 nb (%)
COMIRNATY Dose 2
Na=2682 nb (%)
Placebo Dose 2
Na=2684 nb (%)
Rednessc
Any (>2.0 cm) 156 (5.4) 28 (1.0) 151 (5.6) 18 (0.7)
Mild 113 (3.9) 19 (0.7) 90 (3.4) 12 (0.4)
Moderate 36 (1.2) 6 (0.2) 50 (1.9) 6 (0.2)
Severe 7 (0.2) 3 (0.1) 11 (0.4) 0
Swellingc
Any (>2.0 cm) 184 (6.3) 16 (0.6) 183 (6.8) 5 (0.2)
Mild 124 (4.3) 6 (0.2) 110 (4.1) 3 (0.1)
Moderate 54 (1.9) 8 (0.3) 66 (2.5) 2 (0.1)
Severe 6 (0.2) 2 (0.1) 7 (0.3) 0
Pain at the injection sited
Any 2426 (83.7) 414 (14.2) 2101 (78.3) 312 (11.6)
Mild 1464 (50.5) 391 (13.4) 1274 (47.5) 284 (10.6)
Moderate 923 (31.8) 20 (0.7) 788 (29.4) 28 (1.0)
Severe 39 (1.3) 3 (0.1) 39 (1.5) 0
Notes: Reactions were collected in the electronic diary (e-diary) from Day 1 to Day 7 after vaccination.
No Grade 4 solicited local reactions were reported in participants 16 through 55 years of age.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose. The N for each reaction was the same, therefore, this information was included in the column header.
b n = Number of participants with the specified reaction.
c Mild: >2.0 to ≤5.0 cm; Moderate: >5.0 to ≤10.0 cm; Severe: >10.0 cm.
d Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity.

Table 2: Study 2 - Frequency and Percentages of Participants with Solicited Systemic Reactions, by Maximum Severity, Within 7 Days After Each Dose - Participants 16 Through 55 Years of Age - Reactogenicity Subset of the Safety Population*

COMIRNATY Dose 1
Na=2899 nb (%)
Placebo Dose 1
Na=2908 nb (%)
COMIRNATY Dose 2
Na=2682 nb (%)
Placebo Dose 2
Na=2684 nb (%)
Fever
>38.0oC 119 (4.1) 25 (0.9) 440 (16.4) 11 (0.4)
>38.0oC to 38.4C 86 (3.0) 16 (0.6) 254 (9.5) 5 (0.2)
>38.4C to 38.9C 25 (0.9) 5 (0.2) 146 (5.4) 4 (0.1)
>38.9°C to 40.0C 8 (0.3) 4 (0.1) 39 (1.5) 2 (0.1)
>40.0°C 0 0 1 (0.0) 0
Fatiguec
Any 1431 (49.4) 960 (33.0) 1649 (61.5) 614 (22.9)
Mild 760 (26.2) 570 (19.6) 558 (20.8) 317 (11.8)
Moderate 630 (21.7) 372 (12.8) 949 (35.4) 283 (10.5)
Severe 41 (1.4) 18 (0.6) 142 (5.3) 14 (0.5)
Headachec
Any 1262 (43.5) 975 (33.5) 1448 (54.0) 652 (24.3)
Mild 785 (27.1) 633 (21.8) 699 (26.1) 404 (15.1)
Moderate 444 (15.3) 318 (10.9) 658 (24.5) 230 (8.6)
Severe 33 (1.1) 24 (0.8) 91 (3.4) 18 (0.7)
Chillsc
Any 479 (16.5) 199 (6.8) 1015 (37.8) 114 (4.2)
Mild 338 (11.7) 148 (5.1) 477 (17.8) 89 (3.3)
Moderate 126 (4.3) 49 (1.7) 469 (17.5) 23 (0.9)
Severe 15 (0.5) 2 (0.1) 69 (2.6) 2 (0.1)
Vomitingd
Any 34 (1.2) 36 (1.2) 58 (2.2) 30 (1.1)
Mild 29 (1.0) 30 (1.0) 42 (1.6) 20 (0.7)
Moderate 5 (0.2) 5 (0.2) 12 (0.4) 10 (0.4)
Severe 0 1 (0.0) 4 (0.1) 0
Diarrheae
Any 309 (10.7) 323 (11.1) 269 (10.0) 205 (7.6)
Mild 251 (8.7) 264 (9.1) 219 (8.2) 169 (6.3)
Moderate 55 (1.9) 58 (2.0) 44 (1.6) 35 (1.3)
Severe 3 (0.1) 1 (0.0) 6 (0.2) 1 (0.0)
New or worsened muscle painc
Any 664 (22.9) 329 (11.3) 1055 (39.3) 237 (8.8)
Mild 353 (12.2) 231 (7.9) 441 (16.4) 150 (5.6)
Moderate 296 (10.2) 96 (3.3) 552 (20.6) 84 (3.1)
Severe 15 (0.5) 2 (0.1) 62 (2.3) 3 (0.1)
New or worsened jointpainc
Any 342 (11.8) 168 (5.8) 638 (23.8) 147 (5.5)
Mild 200 (6.9) 112 (3.9) 291 (10.9) 82 (3.1)
Moderate 137 (4.7) 55 (1.9) 320 (11.9) 61 (2.3)
Severe 5 (0.2) 1 (0.0) 27 (1.0) 4 (0.1)
Use of antipyretic or pain medicationf 805 (27.8) 398 (13.7) 1213 (45.2) 320 (11.9)
Notes: Reactions and use of antipyretic or pain medication were collected in the electronic diary (e-diary) from Day 1 to Day 7 after each dose.
No Grade 4 solicited systemic reactions were reported in participants 16 through 55 years of age.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose. The N for each reaction or use of antipyretic or pain medication was the same, therefore, this information was included in the column header.
b n = Number of participants with the specified reaction.
c Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity.
d Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration.
e Mild: 2 to 3 loose stools in 24 hours; Moderate: 4 to 5 loose stools in 24 hours; Severe: 6 or more loose stools in 24 hours.
f Severity was not collected for use of antipyretic or pain medication.

Table 3: Study 2 - Frequency and Percentages of Participants with Solicited Local Reactions, by Maximum Severity, Within 7 Days After Each Dose - Participants 56 Years of Age and Older - Reactogenicity Subset of the Safety Population*

COMIRNATY Dose 1
Na=2008 nb (%)
Placebo Dose 1
Na=1989 nb (%)
COMIRNATY Dose 2
Na=1860 nb (%)
Placebo Dose 2
Na=1833 nb (%)
Rednessc
Any (>2.0 cm) 106 (5.3) 20 (1.0) 133 (7.2) 14 (0.8)
Mild 71 (3.5) 13 (0.7) 65 (3.5) 10 (0.5)
Moderate 30 (1.5) 5 (0.3) 58 (3.1) 3 (0.2)
Severe 5 (0.2) 2 (0.1) 10 (0.5) 1 (0.1)
Swellingc
Any (>2.0 cm) 141 (7.0) 23 (1.2) 145 (7.8) 13 (0.7)
Mild 87 (4.3) 11 (0.6) 80 (4.3) 5 (0.3)
Moderate 52 (2.6) 12 (0.6) 61 (3.3) 7 (0.4)
Severe 2 (0.1) 0 4 (0.2) 1 (0.1)
Pain at the injection sited
Any (>2.0 cm) 1408 (70.1) 185 (9.3) 1230 (66.1) 143 (7.8)
Mild 1108 (55.2) 177 (8.9) 873 (46.9) 138 (7.5)
Moderate 296 (14.7) 8 (0.4) 347 (18.7) 5 (0.3)
Severe 4 (0.2) 0 10 (0.5) 0
Notes: Reactions were collected in the electronic diary (e-diary) from Day 1 to Day 7 after vaccination.
No Grade 4 solicited local reactions were reported in participants 56 years of age and older.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose. The N for each reaction was the same, therefore, the information was included in the column header.
b n = Number of participants with the specified reaction.
c Mild: >2.0 to ≤5.0 cm; Moderate: >5.0 to ≤10.0 cm; Severe: >10.0 cm.
d Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity.

Table 4: Study 2 - Frequency and Percentages of Participants with Solicited Systemic Reactions, by Maximum Severity, Within 7 Days After Each Dose - Participants 56 Years of Age and Older - Reactogenicity Subset of the Safety Population*

COMIRNATY Dose 1
Na=2008 nb (%)
Placebo Dose 1
Na=1989 nb (%)
COMIRNATY Dose 2
Na=1860 nb (%)
Placebo Dose 2
Na=1833 nb (%)
Fever
≥38.0°C 26 (1.3) 8 (0.4) 219 (11.8) 4 (0.2)
≥38.0°C to 38.4C 23 (1.1) 3 (0.2) 158 (8.5) 2 (0.1)
>38.4C to 38.9C 2 (0.1) 3 (0.2) 54 (2.9) 1 (0.1)
>38.9°C to 40.0C 1 (0.0) 2 (0.1) 7 (0.4) 1 (0.1)
>40.0°C 0 0 0 0
Fatiguec
Any 677 (33.7) 447 (22.5) 949 (51.0) 306 (16.7)
Mild 415 (20.7) 281 (14.1) 391 (21.0) 183 (10.0)
Moderate 259 (12.9) 163 (8.2) 497 (26.7) 121 (6.6)
Severe 3 (0.1) 3 (0.2) 60 (3.2) 2 (0.1)
Grade 4 0 0 1 (0.1) 0
Headachec
Any 503 (25.0) 363 (18.3) 733 (39.4) 259 (14.1)
Mild 381 (19.0) 267 (13.4) 464 (24.9) 189 (10.3)
Moderate 120 (6.0) 93 (4.7) 256 (13.8) 65 (3.5)
Severe 2 (0.1) 3 (0.2) 13 (0.7) 5 (0.3)
Chillsc
Any 130 (6.5) 69 (3.5) 435 (23.4) 57 (3.1)
Mild 102 (5.1) 49 (2.5) 229 (12.3) 45 (2.5)
Moderate 28 (1.4) 19 (1.0) 185 (9.9) 12 (0.7)
Severe 0 1 (0.1) 21 (1.1) 0
Vomitingd
Any 10 (0.5) 9 (0.5) 13 (0.7) 5 (0.3)
Mild 9 (0.4) 9 (0.5) 10 (0.5) 5 (0.3)
Moderate 1 (0.0) 0 1 (0.1) 0
Severe 0 0 2 (0.1) 0
Diarrheae
Any 168 (8.4) 130 (6.5) 152 (8.2) 102 (5.6)
Mild 137 (6.8) 109 (5.5) 125 (6.7) 76 (4.1)
Moderate 27 (1.3) 20 (1.0) 25 (1.3) 22 (1.2)
Severe 4 (0.2) 1 (0.1) 2 (0.1) 4 (0.2)
New or worsened muscle painc
Any 274 (13.6) 165 (8.3) 537 (28.9) 99 (5.4)
Mild 183 (9.1) 111 (5.6) 229 (12.3) 65 (3.5)
Moderate 90 (4.5) 51 (2.6) 288 (15.5) 33 (1.8)
Severe 1 (0.0) 3 (0.2) 20 (1.1) 1 (0.1)
New or worsened joint painc
Any 175 (8.7) 124 (6.2) 353 (19.0) 72 (3.9)
Mild 119 (5.9) 78 (3.9) 183 (9.8) 44 (2.4)
Moderate 53 (2.6) 45 (2.3) 161 (8.7) 27 (1.5)
Severe 3 (0.1) 1 (0.1) 9 (0.5) 1 (0.1)
Use of antipyretic or pain medicationf 382 (19.0) 224 (11.3) 688 (37.0) 170 (9.3)
Notes: Reactions and use of antipyretic or pain medication were collected in the electronic diary (e-diary) from Day 1 to Day 7 after each dose.
The only Grade 4 solicited systemic reaction reported in participants 56 years of age and older was fatigue.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose. N for each reaction or use of antipyretic or pain medication was the same, therefore was included in the column header.
b n = Number of participants with the specified reaction.
c Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity; Grade 4 reactions were defined in the clinical study protocol as emergency room visit or hospitalization for severe fatigue, severe headache, severe chills, severe muscle pain, or severe joint pain.
d Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration; Grade 4 emergency visit or hospitalization for severe vomiting.
e Mild: 2 to 3 loose stools in 24 hours; Moderate: 4 to 5 loose stools in 24 hours; Severe: 6 or more loose stools in 24 hours; Grade 4: emergency room or hospitalization for severe diarrhea.
f Severity was not collected for use of antipyretic or pain medication.

In participants with chronic, stable HIV infection the frequencies of solicited local and systemic adverse reactions were similar to or lower than those observed for all participants 16 years of age and older.

Unsolicited Adverse Events

Overall, 11,253 (51.1%) participants in the COMIRNATY group and 11,316 (51.4%) participants in the placebo group had follow-up time between ≥4 months to <6 months after Dose 2 in the blinded placebo-controlled follow-up period with an additional 1,778 (8.1%) and 1,304 (5.9%) with ≥6 months of blinded follow-up time in the COMIRNATY and placebo groups, respectively.

A total of 12,006 (54.5%) participants originally randomized to COMIRNATY had ≥6 months total (blinded and unblinded) follow-up after Dose 2.

In an analysis of all unsolicited adverse events reported following any dose, through 1 month after Dose 2, in participants 16 years of age and older (N=43,847; 21,926 COMIRNATY group vs. 21,921 placebo group), those assessed as adverse reactions not already captured by solicited local and systemic reactions were nausea (274 vs. 87), malaise (130 vs. 22), lymphadenopathy (83 vs. 7), asthenia (76 vs. 25), decreased appetite (39 vs. 9), hyperhidrosis (31 vs. 9), lethargy (25 vs. 6), and night sweats (17 vs. 3).

In analyses of all unsolicited adverse events in Study 2 from Dose 1 up to the participant unblinding date, 58.2% of study participants had at least 4 months of follow-up after Dose 2. Among participants 16 through 55 years of age who received at least one dose of study vaccine, 12,995 of whom received COMIRNATY and 13,026 of whom received placebo, unsolicited adverse events were reported by 4,396 (33.8%) participants in the COMIRNATY group and 2,136 (16.4%) participants in the placebo group. In a similar analysis in participants 56 years of age and older that included 8,931 COMIRNATY recipients and 8,895 placebo recipients, unsolicited adverse events were reported by 2,551 (28.6%) participants in the COMIRNATY group and 1,432 (16.1%) participants in the placebo group. Among participants with confirmed stable HIV infection that included 100 COMIRNATY recipients and 100 placebo recipients, unsolicited adverse events were reported by 29 (29%) participants in the COMIRNATY group and 15 (15%) participants in the placebo group. The higher frequency of reported unsolicited adverse events among COMIRNATY recipients compared to placebo recipients was primarily attributed to events that are consistent with adverse reactions solicited among participants in the reactogenicity subset (Table 3 and Table 4).

Throughout the placebo-controlled safety follow-up period, Bell's palsy (facial paralysis) was reported by 4 participants in the COMIRNATY group and 2 participants in the placebo group. Onset of facial paralysis was Day 37 after Dose 1 (participant did not receive Dose 2) and Days 3, 9, and 48 after Dose 2. In the placebo group the onset of facial paralysis was Day 32 and Day 102. Currently available information is insufficient to determine a causal relationship with the vaccine. In the analysis of blinded, placebo-controlled follow-up, there were no other notable patterns or numerical imbalances between treatment groups for specific categories of non-serious adverse events (including other neurologic or neuro-inflammatory, and thrombotic events) that would suggest a causal relationship to COMIRNATY. In the analysis of unblinded follow-up, there were no notable patterns of specific categories of non-serious adverse events that would suggest a causal relationship to COMIRNATY.

Serious Adverse Events

In Study 2, among participants 16 through 55 years of age who had received at least 1 dose of vaccine or placebo (COMIRNATY =12,995; placebo = 13,026), serious adverse events from Dose 1 up to the participant unblinding date in ongoing follow-up were reported by 103 (0.8%) COMIRNATY recipients and 117 (0.9%) placebo recipients. In a similar analysis, in participants 56 years of age and older (COMIRNATY = 8,931; placebo = 8,895), serious adverse events were reported by 165 (1.8%) COMIRNATY recipients and 151 (1.7%) placebo recipients who received at least 1 dose of COMIRNATY or placebo, respectively. In these analyses, 58.2% of study participants had at least 4 months of follow-up after Dose 2. Among participants with confirmed stable HIV infection serious adverse events from Dose 1 up to the participant unblinding date in ongoing follow-up were reported by 2 (2%) COMIRNATY recipients and 2 (2%) placebo recipients.

In the analysis of blinded, placebo-controlled follow-up, there were no notable patterns between treatment groups for specific categories of serious adverse events (including neurologic, neuro-inflammatory, and thrombotic events) that would suggest a causal relationship to COMIRNATY. In the analysis of unblinded follow-up, there were no notable patterns of specific categories of serious adverse events that would suggest a causal relationship to COMIRNATY.

Postmarketing Experience

The following adverse reactions have been identified during postmarketing use of COMIRNATY, including under Emergency Use Authorization. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to vaccine exposure.

Cardiac Disorders: myocarditis, pericarditis

Gastrointestinal Disorders: diarrhea, vomiting

Immune System Disorders: severe allergic reactions, including anaphylaxis, and other hypersensitivity reactions (e.g., rash, pruritus, urticaria, angioedema)

Musculoskeletal and Connective Tissue Disorders: pain in extremity (arm)

DRUG INTERACTIONS

No Information provided

Read the entire FDA prescribing information for Comirnaty (COVID-19 vaccine, mRNA for Injection)

© Comirnaty Patient Information is supplied by Cerner Multum, Inc. and Comirnaty Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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