The following morning I experienced tiredness, sore arm, swollen armpit, and possible fast heartbeat.; The following morning I experienced tiredness, sore arm, swollen armpit, and possible fast heartbeat.; The following morning I experienced tiredness, sore arm, swollen armpit, and possible fast heartbeat.; I felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot.; I felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot.; I felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot.; I felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot. The following morning I experienced tiredness, sore arm, swollen armpit, and possible fast heartbeat.; I felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot.; I felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot.; This is a spontaneous report from a non-contactable consumer, the patient. A 37-year-old patient of unknown gender received the second dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: ER8735) via an unspecified route of administration in the left arm on 29Apr2021 at 10:15 (at the age of 37-years-old) as a single dose for COVID-19 immunisation. Medical history included depression, anxiety, obesity and Attention Deficit Hyperactivity Disorder (ADD). The patient had no known allergies to medications, food, or other products. Concomitant medications taken within two weeks of vaccination included venlafaxine hydrochloride (EFFEXOR) and lisdexamfetamine mesilate (VYVANSE); both for unknown indication from unknown date. The patient previously received the first dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: EP7533) via an unspecified route of administration in the left arm on 08Apr2021 at 10:15 (at the age of 37-years-old) as a single dose for COVID-19 immunisation. Prior to the vaccination, the patient was not diagnosed with COVID-19. Since the vaccination, the patient had not been tested for COVID-19. The patient did not receive any other vaccines within four weeks prior to the vaccination. On 29Apr2021 at 12:00, the patient felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot. On 30Apr2021, the following morning the patient experienced tiredness, sore arm, swollen armpit, and possible fast heartbeat. Therapeutic measures were not taken as a result of the events. The events did not result in doctor or other healthcare professional office/clinic visit, emergency room/department or urgent care. The clinical outcome of the events felt hungover (moderate/bad headache, nausea, tiredness, dizziness, and light sensitivity) within hours after receiving the second shot, the following morning the patient experienced tiredness, sore arm, swollen armpit, and possible fast heartbeat was resolving at the time of this report.   No follow-up attempts are possible. No further information is expected.