26A-11542-98492

2 vaccinations 10 coded responses 19 check-ins 10 free-text entries 3 call cases

Sex: Female
Age at first dose: 36-40
ZIP prefix: 870 / NM
Registered: 2021-04-30

Relationship: Self
Race: White
Ethnicity: Not Hispanic or Latino

Timeline

Registration Vaccinations Survey responses Call reports Cases without a report Call attempts Call successful Pregnancy survey

2021-04-29
Dose 1 — Pfizer-BioNTech
2021-04-30
Registered in v-safe
2021-04-30
Survey response — days 1–6 daily, dose 1
MedDRA: Dysmenorrhoea, Menstrual disorder — Feeling: Good

Free text: I am currently using nexplanon birth control. I do not menstruate while on the birth control. I rarely have bleeding (light menstruation) while on it. I began light bleeding 3-8 hours after my first vaccine. And it has continued light bleeding (menstruation) today accompanied by light cramping.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-01
Health check-in — days 1–6 daily, dose 1
Feeling: Good · None

Adult check-in
2021-05-04
Survey response — days 1–6 daily, dose 1
MedDRA: Contraception, Vaginal haemorrhage — Feeling: Good

Free text: This is day 7 of vaginal bleeding. This is very rare for me. I am on Nexplanon birth control and rarely bleed at all and if I do, it is spotting for 1 day.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-05
Survey response — days 1–6 daily, dose 1
MedDRA: Heavy menstrual bleeding, Menstrual disorder — Feeling: Fair · Headache

Free text: I am still bleeding (menstruating). As previously reported, I am on Nexplanon birth control and having a period is extremely rare for me. If I do bleed, it is very light for 1 day.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-06
Survey response — day 7, dose 1
MedDRA: Menstrual disorder — Feeling: Good · Headache

Free text: I am still bleeding/menstruating which is very rare. I am on Nexplanon and do not get a period.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-13
Health check-in — day 14, dose 1
Feeling: Good

Adult check-in
2021-05-20
Dose 2 — Pfizer-BioNTech
2021-05-20
Survey response — day 0, dose 2
MedDRA: Arthralgia, Musculoskeletal stiffness, Neck pain — Feeling: Good · Site: Pain · Headache

Free text: I have some soreness/stiffness in my shoulder/neck of the side where I got the shot. Im not sure if this is from my workout or the shot.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-05-21
Health check-in — days 1–6 daily, dose 2
Feeling: Good · Site: Pain · Fatigue or tiredness

Adult check-in
2021-05-22
Health check-in — days 1–6 daily, dose 2
Feeling: Fair · Headache

Adult check-in
2021-05-23
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-05-24
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-05-26
Health check-in — days 1–6 daily, dose 2
Feeling: Good · None

Adult check-in
2021-05-27
Health check-in — day 7, dose 2
Feeling: Good · None

Adult check-in
2021-06-03
Health check-in — day 14, dose 2
Feeling: Good

Adult check-in
2021-06-12
Survey response — day 21, dose 2
MedDRA: Menstruation irregular — Feeling: Fair

Free text: I started my period. This is very rare with the Nexplanon birth control Im on. I never get my period.

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-06-24
Survey response — day 35, dose 2
MedDRA: Headache, Irritability, Menstruation irregular, Office visit — Feeling: Fair · Get care from a doctor or other healthcare professional

Free text: Symptoms: I have headaches. I have visited my doctor to discuss my drastic changes in my period/menstruation. I feel very irritable, which is abnormal for me. · Healthcare visit (other): Visited my doctor at her office

MedDRA releases: 2021-09,2023-04,2024-11 · check-in free text available
2021-06-24
Report sent to call center — day 35, dose 2
Get care from a doctor or other healthcare professional

1 call case(s)
2021-07-01
Call 2 — Left Voicemail
2021-08-19
Survey response — 3 months, dose 2
MedDRA: Nasopharyngitis — Feeling: Good

Free text: Cold symptoms

MedDRA releases: 2021-09,2024-11 · check-in free text available
2021-11-18
Survey response — 6 months, dose 2
MedDRA: Menstrual disorder — Feeling: Good · Get care from a doctor or other healthcare professional · Outpatient clinic or urgent care clinic visit

Free text: Began menstruating on and off for the past 6 months, which is abnormal for me as I am on Nexplanon birth control.

MedDRA releases: 2024-11 · check-in free text available
2021-11-18
Report sent to call center — 6 months, dose 2
Get care from a doctor or other healthcare professional

Outpatient clinic or urgent care clinic visit · 1 call case(s)
2021-11-19
Call 2 — Left Voicemail
2022-05-20
Survey response — 12 months, dose 2
MedDRA: Menstruation irregular — Feeling: Good · Get care from a doctor or other healthcare professional · Outpatient clinic or urgent care clinic visit

Free text: As mentioned in all my check ins, I experience sporadic bleeding/menstruating in between cycles which is very rare for me as I've been on Nexplanon birth control for 8 years. I experienced little to no bleeding prior to vaccine.

MedDRA releases: 2024-11 · check-in free text available
2022-05-20
Report sent to call center — 12 months, dose 2
Get care from a doctor or other healthcare professional

Outpatient clinic or urgent care clinic visit · 1 call case(s)
2022-05-23
Call 1 — Left Voicemail
2022-05-23
Call 1 — Left Voicemail
2022-05-23
Call 1 — Left Voicemail

Vaccinations

Dose	Date	Manufacturer	Co-administered
1	2021-04-29	Pfizer-BioNTech
2	2021-05-20	Pfizer-BioNTech

Call center

3 call center cases

3 unsuccessful

See the call center timeline

Free text

Release 8 — days 1–6 daily, dose 1

2021-04-30

Systemic reaction (other): I am currently using nexplanon birth control. I do not menstruate while on the birth control. I rarely have bleeding (light menstruation) while on it. I began light bleeding 3-8 hours after my first vaccine. And it has continued light bleeding (menstruation) today accompanied by light cramping.

2021-05-04

Systemic reaction (other): This is day 7 of vaginal bleeding. This is very rare for me. I am on Nexplanon birth control and rarely bleed at all and if I do, it is spotting for 1 day.

2021-05-05

Systemic reaction (other): I am still bleeding (menstruating). As previously reported, I am on Nexplanon birth control and having a period is extremely rare for me. If I do bleed, it is very light for 1 day.

Release 8 — day 7, dose 1

2021-05-06

Systemic reaction (other): I am still bleeding/menstruating which is very rare. I am on Nexplanon and do not get a period.

Release 8 — day 0, dose 2

2021-05-20

Systemic reaction (other): I have some soreness/stiffness in my shoulder/neck of the side where I got the shot. Im not sure if this is from my workout or the shot.

Release 9 — day 21, dose 2

2021-06-12

Symptoms: I started my period. This is very rare with the Nexplanon birth control Im on. I never get my period.

Release 9 — day 35, dose 2

2021-06-24

Symptoms: I have headaches. I have visited my doctor to discuss my drastic changes in my period/menstruation. I feel very irritable, which is abnormal for me.

Healthcare visit (other): Visited my doctor at her office

Release 9 — 3 months, dose 2

2021-08-19

Symptoms: Cold symptoms

Release 10 — 6 months, dose 2

2021-11-18

Symptoms: Began menstruating on and off for the past 6 months, which is abnormal for me as I am on Nexplanon birth control.

Release 11 — 12 months, dose 2

2022-05-20

Symptoms: As mentioned in all my check ins, I experience sporadic bleeding/menstruating in between cycles which is very rare for me as I've been on Nexplanon birth control for 8 years. I experienced little to no bleeding prior to vaccine.

Each entry is dated by the survey it was written in (the CDC re-sent the releases with survey dates in 2025); click a date to see that survey response. The CDC cut some text off at about 250 characters: symptoms in every release, and the other two fields in releases 9-12. Those entries are marked "cut off by CDC".

MedDRA terms by release

Field	Preferred term	2021-09	2023-04	2024-11
HCVO	Office visit	✓	✓	✓
SD	Headache	✓	✓	✓
SD	Irritability	✓	✓	✓
SD	Menstrual disorder	·	·	✓
SD	Menstruation irregular	✓	✓	✓
SD	Nasopharyngitis	✓	·	✓
SRO	Arthralgia	✓	✓	✓
SRO	Contraception	✓	✓	✓
SRO	Dysmenorrhoea	✓	✓	✓
SRO	Heavy menstrual bleeding	✓	✓	✓
SRO	Menstrual disorder	✓	✓	✓
SRO	Musculoskeletal stiffness	✓	✓	✓
SRO	Neck pain	✓	✓	✓
SRO	Vaginal haemorrhage	✓	✓	✓

✓ active code · ○ coded but marked inactive · blank = not in that release