Lost of taste and smell/taste and smell went haywire; Lost of taste and smell/taste and smell went haywire; Leg weakness; Difficulty standing/Legs were weak when he got up to stand up; went to stand up on them and they didn't want to hold him up; Sleepy; Doesn't remember the 50 miles trip home or getting in the house or parking his truck across the street"; Sciatic nerve decided to hurt and whole body was on the aching side; Had some pain in the lower abdomen/lower abdomen like he had to go to the bathroom and it happened out of the blue and then it went away. Clarifies that he had pain in the lower abdomen; Fatigue; This is a spontaneous report from a contactable consumer (patient). A 66-year-old male patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; solution for injection, Lot Number: EWO15O), via unspecified route of administration, in left arm on 08Apr2021 at 11:00 (at the age of 66-year-old) as a dose 1, single for COVID-19 immunization. The patient medical history included pain in back and sciatic nerve pain (patient had a past medical history of having pain in his back and sciatic nerve pain so that's why he takes Robaxin). The patient past drug event included Robaxin (patient has the Robaxin for when his sciatic nerve hurts and he take it when he wants to and it decided to hurt). The concomitant medication of the patient was not reported. On 08Apr2021, the patient experienced some pain in the lower abdomen like he had to go to the bathroom and it happened out of the blue and then it went away. Patient clarifies that he had pain in the lower abdomen, fatigue, sleepy, doesn't remember the 50 miles trip home or getting in the house or parking his truck across the street and sciatic nerve decided to hurt and whole body was on the aching side. Patient stated that about two afterward after receiving vaccine he had some pain in the lower abdomen like he had to go into the bathroom but didn't have diarrhea but he doesn't think its related to the vaccine. About three hours after the vaccine patient experienced some fatigue but and took an excedrin, benadryl and a robaxin so that patient was tired. Patient had past medical history of having pain in his back and sciatic nerve pain so that's why he was on robaxin.  Patient was fatigued for a few days. On 09Apr2021 the patient experienced leg weakness and difficulty standing when he got up to stand up; went to stand up on them and they didn't want to hold him up. Patient stated that he was walking around by 12Apr2021 and was okay by then. On an unspecified date the patient experienced lost of taste and smell went haywire. Patient reported that 2 weeks after the vaccine his taste and smell went haywire. Patient was recovered from that around 2-3 weeks after and it was lasted for 2-3 weeks exact dates were unknown to patient. Patient had to use more salt to get the taste. Patient stated that he tolerates medications well and doesn't have any allergies. Patient had some queries and needed to find out his adverse reactions. Patient wanted to know if those were normal. Patient queried, since he lost his taste and smell, does that mean that he had COVID. Therapeutic measures were taken that included Excedrin, Benadryl and Robaxin for the reported events. The patient recovered from the events lost of taste and smell/taste and smell went haywire and sciatic nerve decided to hurt and whole body was on the aching side on an unspecified date in 2021, patient recovered from pain in the lower abdomen on 08Apr2021, patient recovered from fatigue, sleepy, doesn't remember the 50 miles trip home or getting in the house or parking his truck across the street on 09Apr2021, and recovered from the event leg weakness and difficulty standing on 12May2021.  Follow-up attempts completed. No further information expected.