vitamin b12 injection dosage for pernicious anemia and Frequency: 7 Guidelines Adults Needle less injections for pernicious

[16] Special investigations may be indicated to rule out other causes of oral ulceration

Oral supplements work for some, but if you have absorption issues, injections are much more effective

The initial management of overdose: After a careful clinical evaluation of the patient the importance of time elapsed since last ingestion or administration, the amount of poison swallowed and discarding the contraindication of certain procedures, the professional will decide whether or not the treatment of general rescue: emesis or gastric lavage, activated charcoal and saline purgative (45 to 60 minutes after the activated carbon), hemodialysis

Also, it is worth noting that your vet might have demonstrated the technique in a slightly different order

Comprehensive laboratory monitoring showed no clinically significant changes in hematology, biochemistry, or urinalysis parameters