CClinicalTrials.gg
CompletedNCT01832129Updated Jun 14, 2016

Vitamin B12 Acceptance and Biomarker Response Study

A Phase 4 interventional study of Oral administration of vitamin B12 and i.m. injection of vitamin B12 in Vitamin B 12 Deficiency, sponsored by University Hospital, Basel, Switzerland. Completed at 1 site in Switzerland. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2016-06-14.

Sponsored by University Hospital, Basel, Switzerland · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
37
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

In this study, biomarker response after supplementation with oral and intramuscular vitamin B12 will be compared in a randomized clinical trial. Electronic compliance monitoring will be used to control for non compliance as a possible confounder in oral treatment. Additionally subjective acceptance in terms of presumed preferences will be compared with oral vs. intramuscular supplementation of vitamin B12 in the view of the patient.

02

Conditions studied

  • Vitamin B 12 Deficiency
03

In context

Vitamin B 12 Deficiency

72 studies on the registry are indexed under Vitamin B 12 Deficiency; 10 are open to participants now.

This study's enrollment of 37 is below the median of 65 across 44 interventional studies indexed under Vitamin B 12 Deficiency.

Browse Vitamin B 12 Deficiency studies →

Lead sponsor

University Hospital, Basel, Switzerland is the lead sponsor of 968 studies on the registry; 191 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • General practitioner's prescription for Vitamin B12 deficiency testing
  • Age> 18 years
  • Ability to give written informed consent
  • Vitamin B12 serum concentrations \< 200pmol/l
  • indication for vitamin B12 supplementation according to the General practitioners estimation

Exclusion criteria

Exclusion Criteria:

  • Patients with incorrect intake of vitamin preparations containing vitamin B12
  • Patients with previously diagnosed dementia
  • Patients with known hereditary transcobalamin transportation defects
  • lack of written and/or oral understanding in German, French, Italian or English languages
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
37 participants (actual)

Study arms

  • Active comparator
    i.m. injection of Vitamin B12

    Weekly i.m. injections of 1 mg Cyanocobolamin after 1, 2, and 3 weeks.

    Drug: i.m. injection of vitamin B12

  • Experimental
    Oral administration of vitamin B12

    High dose (1 mg/day) oral Cyanocobolamin will be adminstrated with electronic adherence monitoring.

    Drug: Oral administration of vitamin B12

Interventions

  • DrugOral administration of vitamin B12

    Daily high dose oral vitamin B12 (1mg) will be administered over 4 weeks. The patients adherence to this regimen will be monitored with an electronic punch card.

    Also known as: Cyanocobolamin, B12 "Ankermann" 1 mg

  • Drugi.m. injection of vitamin B12

    Intramuscular injections of 1 mg vitamin B12 will be performed at days 7, 14, and 21.

    Also known as: Vitamin B12 intramuscular, Cyanocobolamin, Vitarubin Depot

06

What researchers measure

Primary outcomes

  1. Biochemical response to vitamin B12 substitution

    Vitamin B12 associated biomarkers (Vitamin B12, Holotranscobolamin, Homocystein, MCV, hypersegmentated neutrophils)

    Time frame: Day 28

Secondary outcomes

  1. taking and timing adherence with oral vitamin B12

    Adherence to oral vitamin B12 supplementation will be measured with an electronic adherence monitoring device. The number of doses taken (taking adherence) and the number of doses taken within the defined time-frame (timing adherence) will be measured.

    Time frame: day 28

  2. Comparison of patient acceptance of oral vs. i.m. vitamin B12 supplementation

    Acceptance of the two routes of administration of vitamin B12 substitution by the patients will be measured by specific questionnaires before and after exposure to the medication in both arms.

    Time frame: day 0, day 28

07

Study locations

1 site
  • Pharmaceutical Care Research Group
    Basel, CH-4056, Switzerland
08

References and documents

Publications

  • Metaxas C, Mathis D, Jeger C, Hersberger KE, Arnet I, Walter P. Early biomarker response and patient preferences to oral and intramuscular vitamin B12 substitution in primary care: a randomised parallel-group trial. Swiss Med Wkly. 2017 Apr 7;147:w14421. doi: 10.4414/smw.2017.14421. eCollection 2017. PubMed 28421567 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 14, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01832129
Lead sponsor
University Hospital, Basel, Switzerland
Collaborators
University of Basel, Aarelab AG
Responsible party
Philipp Walter, PhD (MSc, University of Basel) — Principal investigator
First posted
Apr 15, 2013
Start date
May 2013
Primary completion
Dec 2015
Completion
Dec 2015
Last update
Jun 14, 2016

Study contacts

Kurt E Hersberger, Professor
study chair · Pharmaceutical Care Research Group
Cyrill Jeger, MD
principal investigator
Philipp N Walter, MSc
study director · Pharmaceutical Care Research Group

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jun 2016. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion