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Medications · Energy & nutritional
Cyanocobalamin
Standard injectable B12 form.
What it does
What Cyanocobalamin is and why doctors prescribe it.
Cyanocobalamin is the most widely used and most studied form of injectable B12. Doctors prescribe it for B12 deficiency and as part of metabolic and energy programs. It's the form used in many traditional 'B12 shot' protocols.
How it works
Mechanism in plain English.
Like other B12 forms, cyanocobalamin is converted intracellularly into the active methylcobalamin and adenosylcobalamin cofactors. The 'cyano' moiety is small and clinically irrelevant at standard doses; conversion proceeds rapidly after administration.
How long it's been studied
Research history.
Cyanocobalamin has the longest clinical track record of the injectable B12 forms, with widespread use since the 1950s and decades of dosing data.
Dosing
Clinical context for the prescribing doctor.
Doctor-prescribed. Injectable cyanocobalamin at 1 mg/mL is dispensed for subcutaneous or intramuscular administration on schedules matching indication: loading, maintenance, or programmatic use.
This page is informational, not a dispensing aid. Cyanocobalamin is dispensed only on a patient-specific prescription written by a licensed doctor for an identified patient. Compounded drugs are not FDA-approved and should not be evaluated using branded-drug trial data. Availability varies by state and prescribed medication.
How to access Cyanocobalamin through RonanRx
Three paths.
Doctors can prescribe compounded Cyanocobalamin for individual patients through RonanRx. Patients with a doctor can sign up to receive their prescription. Patients without a doctor can learn how the referral works.
Patient with a doctor
Sign up to receive your prescription.
If your doctor has already prescribed Cyanocobalamin, sign up so we can prepare and ship your medication. The signup wizard collects intake and connects you to the prescribing workflow.
Patient without a doctor
Get referred by a partner clinic.
RonanRx prescribes through partner clinics — we don't initiate prescriptions on this site. Read how the referral process works and how to find a partner clinic in your state.