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methylcobalamin

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Brand names: Methyl B12

Active Vitamin B12 OTC

Methyl B12 is a form of vitamin B12. It may help with weight support and increased appetite.

What it does

This medicine may help with weight support.

Common side effects

No common side effects listed.

Key warnings

This information is not provided in the source data.

How It Works

This information is not provided in the source data.

How to Take It

Place 1 to 10 drops under your tongue. Do this 3 times a day. Or, take it as your doctor tells you to. If you are under 12, ask a doctor before using this medicine.

Pregnancy & Breastfeeding

This information is not provided in the source data.

Missed Dose

This information is not provided in the source data.

Storage

This information is not provided in the source data.

Serious Warnings

This information is not provided in the source data.

Known Drug Interactions

Drugs which may interact with vitamin B 12 (Methylcobalamin): • Antibiotics, cholestyramine, colchicines, colestipol, metformin, para-aminosalicylic, and potassium chloride may decrease the absorption of vitamin B 12 .

Mechanism: Both of these products contain vitamin B12, so taking them together increases the total amount of this vitamin in your body.

What to do: Check with your doctor or pharmacist to make sure your total vitamin B12 intake is safe and appropriate for you.

Common Questions

What is this medicine used for?
It is used for temporary relief of symptoms like weight support and increased appetite.
How many times a day should I take this?
Take 1 to 10 drops under the tongue 3 times a day.
Can children take this medicine?
Ask a doctor before giving this to children under 12 years old.
Is this medicine approved by the FDA?
The statements about this medicine have not been reviewed by the Food and Drug Administration.
What do I do if I forget to take a dose?
This information is not provided in the source data.
Are there any side effects?
This information is not provided in the source data.
How should I store this medicine?
This information is not provided in the source data.
Can I take this if I am pregnant?
This information is not provided in the source data.
What does 'homeopathic principles' mean?
This information is not provided in the source data.
Should I talk to my doctor before taking this?
Yes, consult a health professional for directions.
Does methylcobalamin interact with other medications?
Yes, methylcobalamin has 1 known drug interactions. Notable interactions include prenatal multivitamin. Always inform your doctor about all medications you are taking.
What drug class is methylcobalamin?
methylcobalamin belongs to the Active Vitamin B12 drug class. It is available over the counter (OTC). This medicine may help with weight support.
Is methylcobalamin safe during pregnancy?
This information is not provided in the source data.. Always consult your healthcare provider before using any medication during pregnancy or breastfeeding.
Has methylcobalamin been recalled?
There are 5 recalls associated with methylcobalamin products. Lack of Assurance of Sterility. Check the recalls section below for full details and affected products.

Active Recalls

Class II May 21, 2025

Lack of Assurance of Sterility

Thrive Health and Wellness, LLC, dba Thrive Health Solutions (Colorado)

Class II October 7, 2022

Lack of Assurance of Sterility: FDA inspection found the recalled products were produced in a manner than cannot guarantee the sterility of the products purported to be sterile.

Pharmacy Plus, Inc. dba Vital Care Compounder

Class II March 7, 2022

Lack of Assurance of Sterility

TMC Acquisition LLC dba Tailor Made Compounding

Class II March 7, 2022

Lack of Assurance of Sterility

TMC Acquisition LLC dba Tailor Made Compounding

Class II May 29, 2013

Lack of Assurance of Sterility: FDA inspection findings resulted in concerns regarding quality control processes

Lowlite Investments, Inc. D/B/A Olympia Pharmacy

Related Medications in Active Vitamin B12

Other drugs grouped near methylcobalamin — same-class peers and common alternatives.

Compare methylcobalamin vs ascorbic acid side-by-side →

Medication Guides

Related Health & Safety Data

What the FDA Data Shows for methylcobalamin

The FDA label for methylcobalamin (sold under brand names such as Methyl B12) classifies it as an over-the-counter product in the Active Vitamin B12 class. This medicine may help with weight support. Labeling covers dosing, contraindications, and monitoring requirements derived from clinical trials.

Post-market surveillance from the FDA Adverse Event Reporting System (FAERS) captures real-world experience. Voluntary reports accumulate over the lifetime of a drug and reflect wide-ranging clinical use. The database also lists 1 documented drug interaction derived from FDA labeling, with the top-flagged interaction rated minor severity. Acquisition-cost data is surveyed weekly by CMS and updated as manufacturers report changes.

Report counts do not establish causation — a FAERS entry documents a temporal association, not proof that the drug produced the outcome. Widely prescribed medications naturally accumulate more reports than niche therapies, so raw totals must be interpreted alongside total exposure. Shortage status, recall history (currently 5 recall records on file), and patent information further shape supply and switching decisions. This page summarizes public FDA data for educational purposes only and is not a substitute for professional medical advice — always consult a licensed healthcare provider before starting, stopping, or changing any medication.

Data Sources

Drug labeling: FDA Drug Labels (SPL/DailyMed). Adverse events: FDA Adverse Event Reporting System (FAERS).

FAERS reports are voluntary and do not establish causation. Drug interactions are derived from FDA labeling and clinical references. Always consult a healthcare professional before making medication decisions.

Last updated: October 23, 2024

All federal data sources used on this page