How many tablets are in a bottle of oral vitamin B12 (cyanocobalamin)?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: September 15, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

Number of Tablets in a Bottle of Oral Vitamin B12

A standard bottle of oral cyanocobalamin (vitamin B12) contains 100 tablets 1.

Product Specifications

The FDA-labeled product information clearly indicates:

  • Bottle size: 100 tablets
  • Strength: 1000 mcg per tablet
  • Dosing: 1 tablet daily 1

Clinical Context

While the evidence provided focuses primarily on treatment protocols and dosing strategies for vitamin B12 deficiency rather than packaging specifications, the drug label data confirms the standard commercial packaging is 100 tablets per bottle 1. This quantity provides approximately 3 months of daily supplementation at the standard 1000 mcg daily dose recommended for adults 1.

Standard Dosing Reference

  • Adults 18 years and older: 1000 mcg (1 tablet) daily, preferably with a meal 1
  • Persons under 18 years: Consult physician 1

Note: The 100-tablet bottle size represents the most common over-the-counter packaging format for oral cyanocobalamin supplements in the United States, though other bottle sizes may exist depending on manufacturer and distribution channel.

References

Related Questions

Should the patient continue monthly intramuscular vitamin B12 (cyanocobalamin) injections to maintain adequate serum B12 levels?
What oral vitamin B12 (cyanocobalamin or methylcobalamin) dosing regimens are recommended for an adult with documented vitamin B12 deficiency?
In a patient with a serum vitamin B12 level of 127 pg/mL, should supplementation be initiated with intramuscular cyanocobalamin or high‑dose oral cyanocobalamin?
What is cyanocobalamin, its dosing, indications, and safety profile?
In a patient without alcohol use who had a baseline serum vitamin B12 <200 pg/mL and then received cyanocobalamin, does the rapid rise to 1000 pg/mL confirm adequate cellular absorption, and how should cellular uptake be evaluated?
Why should patients with restless legs syndrome (RLS) start exercising slowly and gradually increase intensity?
What is the recommended treatment for a 3.1 cm complex cyst in the right ovary with intraluminal debris, wall thickening, and peripheral rim of vascularity?
In a 43-year-old woman with perimenopausal symptoms and a small hemorrhagic simple ovarian cyst on ultrasound, are the new irregular periods normal for perimenopause?
What is the appropriate emergency evaluation and management for a 13-year-old male with new-onset headache, a brief episode of transient total visual loss while stretching, persistent headache, and tinnitus?
What skin lesions or diseases can be manifestations of a paraneoplastic process?
How should recurrent poison ivy dermatitis be managed in a female patient whose rash resolved with clobetasol 0.05% cream but recurred after discontinuation?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.