MEDICATION INDUCED COLITIS; RECTAL BLEEDING; RENAL INSUFFICIENCY; MUSCLE TENDERNESS; HEADACHE; NAUSEA; REDNESS AT INJECTION SITE; FEVER; GENERALIZED ITCHY RASH; SWELLING AT INJECTION SITE; DIZZINESS; RINGING IN THE RIGHT EAR; INTENSE MUSCLE/JOINT CRAMPING; JOINT TIGHTNESS; LUMP AT INJECTION SITE; BLOATING; UNABLE TO EAT OR DRINK; HAD POLYP; SMALL INTERNAL HEMMORRHOID; This spontaneous report received from a patient concerned a 50 year old female. The patient's weight, height, and medical history were not reported. The patient received covid-19 vaccine ad26.cov2.s (suspension for injection, route of admin not reported, and batch number: 1805029 expiry: unknown) dose was not reported, 1 total administered to left deltoid on 14-MAR-2021 for prophylactic vaccination. The patient received Benadryl unspecified (form of admin and route of admin were not reported, batch number: unknown expiry: unknown) dose and frequency were not reported from MAR-2021 for itchy rash. The batch number was not reported and has been requested. No concomitant medications were reported.  On 14-MAR-2021, after eight hours of vaccination, the patient woke up with intense muscle cramping which she had anticipated but also had joint cramp. The patient had temperature of 103.5 (unit unspecified) and the patient's right side of face was itching down into under her ears which also started to swell. The patient had a rash on her legs, arms, face and everything was itchy for her. The patient took a diphenhydramine (Benadryl) and then she had headache, dizziness, ringing in the right ear, nausea, and her fever jumped to 104. The patient laid down her head into floor because the dizziness was so bad and she ended up in more muscle cramping. The patient's fever never went away but went down and did not go for about a week and three days; the fever was just hanging out at 100 (unit unspecified) the whole time. The patient's dizziness and ringing was going on and also had GI (gastrointestinal) problems and really bad headache. The patient called a healthcare company and ordered meclizine (Meclizine) but did not specified she administered it or not. On 26-MAR-2021, the patient could not take the stomach pain, cramping, diarrhea, high fever, rectal bleeding and mucusy and bloody stool. The patient had intense abdominal pain and GI (gastrointestinal) issues after three days of her fever and was taken to ER (emergency room) and was confirmed that the patient had renal insufficiency and medication induced colitis. The patient had colitis and was given with metronidazole (Flagyl), however she had low grade fever, dizziness, ringing in ears, really bad headache and was admitted to hospital on 28-MAR-2021. The patient's CRP (C-reactive protein) was up, lactic acid was elevated, hemoglobin went from 14 down to 12, WBC count elevated, occult blood was positive and also had rectal bleeding, a foggy headache and dizziness feeling. The patient felt something was way off in her body at the side, also had a small orange halo on arm at the injection site which got resolved after four days. The patient had undergone unspecified tests and the results was negative. The patient liver enzymes were too off which was hand in hand with medication induced colitis. The patient had a small internal hemorrhoid and removed a polyp. The patient's heart rate experienced some issues as well. The patient was hospitalized for 6 days. The patient was discharged on 02-APR-2021.The patient had a follow-up with her physician on the next day of this report. The action taken with covid-19 vaccine ad26.cov2.s was not applicable; and action taken with Benadryl unspecified was not reported. The patient recovered from had polyp on MAR-2021, generalized itchy rash on 16-MAR-2021, muscle tenderness on 06-APR-2021, and redness at injection site on 18-MAR-2021, was recovering from ringing in the right ear, rectal bleeding, medication induced colitis, joint tightness, lump at injection site, bloating, swelling at injection site, and small internal hemorrhoid, had not recovered from fever, headache, and dizziness, and the outcome of intense muscle/joint cramping, nausea, unable to eat or drink and renal insufficiency was not reported. This report was serious (Hospitalization Caused/Prolonged, and Other Medically Important Condition). This case is associated with the product quality complaint number 90000176228. This case is a duplicate of 20210429754.  Additional information was received from patient on 13-APR-2021. It was determined that Manufacturer Case Number 20210429754 was a duplicate of this case. All relevant information regarding this case will be submitted under Manufacturer Case Number 20210427282.; Sender's Comments: V0: 20210427282-covid-19 vaccine ad26.cov2.s- rectal bleeding, medication induced colitis, renal insufficiency and had polyp. This event(s) is considered not related. The event(s) has a compatible/suggestive temporal relationship, is unlabeled, and has unknown scientific plausibility. There are other factors more likely to be associated with the event(s) than the drug. Specifically: CONMEDS-OTHER SUSPECT DRUGS