cat vitamin b12 injection side effects Do vaccines have effects?, On rare occasions, cats may develop mild flu-like symptoms or a small reaction at the site. Very rarely, allergic reactions such as hives, swelling, or B12 injections in kitten! :
Description
Sublingual is probably slightly better than oral B12 capsules but I dont think the difference is that huge

In the available data, 5-Amino-1MQ has generally been reported as well-tolerated but generally well-tolerated in limited data is not the same as proven safe for everyone. Human safety data is still limited, long-term effects aren't fully characterized, and that uncertainty is itself a reason for medical oversight
This helps you identify when symptoms are unrelated to the peptide and need investigation elsewhere

Par injection intramusculaire dans le traitement de la carence en vitamine B12 : - En traitement initial : une ampoule par jour ou trois fois par semaine, en injection intramusculaire, pour un total de 10 ampoules

They are also necessary for the development of red blood cells and aid in the reduction of the effects of stress

ANIMAL SAFETY SUMMARY: Adult dogs receiving enrofloxacin orally at a daily dosage rate 52 mg/kg for 13 weeks had only isolated incidences of vomition and inappetence
