ClinicalTrials.gg
Status unknownNCT03354507Updated Nov 28, 2017

Use of Sodium Bicarbonate in Patients Treated With Topiramate

An interventional study of Sodium bicarbonate in Epilepsy, Metabolic Acidosis and Tubular Acidosis; Renal, sponsored by McMaster Children's Hospital. Status unknown at 1 site in Canada. Open to participants aged 2 Years to 18 Years. Per ClinicalTrials.gov, last updated 2017-11-28.

Sponsored by McMaster Children's Hospital · Not applicable, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Nov 2017), so the status shown — last known as Not yet recruiting — may be out of date.
Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Non-randomized
Ages
2 Years to 18 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 96 studies in Epilepsy with a site in Canada — 18 open to participants now, 21 under way, 6 of them phase 3. Epilepsy · Canada.

Planned enrollment
57th of 77
40 · median 108
Started
2018
with 9 others
No phase
19 of 96
3 open now
Registered
57th of 96
by date

Among the 96 studies in Epilepsy with a site in Canada, this one is the 57th largest by planned enrollment of the 77 interventional ones that give a count, is one of 10 that started in 2018, is one of 19 with no phase, and was the 57th registered.

Epilepsy

1,848 studies on the registry are indexed under Epilepsy; 422 are open to participants now.

Browse Epilepsy studies →

Open to participants now

18 of the 96 studies in Epilepsy with a site in Canada are open now. Recruiting first, the newest first:

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All 18 open studies →

A study can be open while its sites in Canada have not opened yet or have stopped. Only those recruiting at a site in Canada →

Who these studies take

Of the 285 Epilepsy studies recruiting now, 113 (40%) set no upper age limit and 149 (52%) stop at 75 or younger; 139 take children under 18; 56 take healthy volunteers.

This study: 2 Years to 18 Years · all sexes · no healthy volunteers.

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02

Study summary

Effect of oral sodium bicarbonate therapy on renal tubular acidosis in epilepsy patients taking topiramate.

Read the detailed description

Children on topiramate are at a risk of renal tubular acidosis and subsequent development of renal stones. Sodium bicarbonate has been shown to reduce renal tubular acidosis in other populations. To date, no data exist on the efficacy of correction of renal tubular acidosis in pediatric patients on topiramate. We are proposing to investigate the efficacy of 4 weeks of oral sodium bicarbonate therapy to reduce tubular acidosis in patients on topiramate.

03

Conditions studied

  • Epilepsy
  • Metabolic Acidosis
  • Tubular Acidosis; Renal

Keywords

  • topiramate
  • epilepsy
  • sodium bicarbonate
  • urine alkalinization
04

Who can participate

Ages eligible
2 Years to 18 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients with epilepsy receiving oral topiramate for a minimum of 3 months

Exclusion criteria

Exclusion Criteria:

  • pre-existing renal impairments (ie nephropathy, primary nephritis)
  • receiving other medications or diet therapies that may influence renal function or urine acidity/ citrate concentration
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
40 participants (estimated)

Study arms

  • Experimental
    Sodium Bicarbonate

    Patients will receive sodium bicarbonate for 4 weeks, based on pre-calculated weight based doses. Patients are selected if they have metabolic acidosis at baseline. \< 24 kg : 1/4 teaspoon bid. 24 - 42 kg : 1/2 teaspoon bid. \> 42kg : 3/4 teaspoon bid.

    Dietary Supplement: Sodium bicarbonate

  • No intervention
    Control

    Patients will not receive treatment if they do not have metabolic acidosis at baseline.

Interventions

06

What researchers measure

Primary outcomes

  1. Changes in measured urine parameters

    Spot urine sample will be tested for calcium, creatinine and citrate

    Time frame: Baseline, then at 4 weeks

Secondary outcomes

  1. Changes in measured blood parameters.

    sodium, potassium, chloride, calcium, magnesium, phosphate, bicarbonate, alkaline phosphatase, urea, creatinine, venous blood gas

    Time frame: Baseline, then at 4 weeks

  2. Changes in frequency of seizures.

    Changes in seizure entries in seizure diary

    Time frame: Baseline, then at 4 weeks

07

Study locations

1 site
  • McMaster Children's Hospital
    Hamilton, Ontario L8N 3Z5, Canada
08

References and documents

Publications

  • Ben-Menachem E, Sander JW, Stefan H, Schwalen S, Schauble B. Topiramate monotherapy in the treatment of newly or recently diagnosed epilepsy. Clin Ther. 2008 Jul;30(7):1180-95. doi: 10.1016/s0149-2918(08)80045-8. PubMed 18691980 ↗
  • Caudarella R, Vescini F. Urinary citrate and renal stone disease: the preventive role of alkali citrate treatment. Arch Ital Urol Androl. 2009 Sep;81(3):182-7. PubMed 19911682 ↗
  • Coe FL, Evan A, Worcester E. Kidney stone disease. J Clin Invest. 2005 Oct;115(10):2598-608. doi: 10.1172/JCI26662. PubMed 16200192 ↗
  • Dell'Orto VG, Belotti EA, Goeggel-Simonetti B, Simonetti GD, Ramelli GP, Bianchetti MG, Lava SA. Metabolic disturbances and renal stone promotion on treatment with topiramate: a systematic review. Br J Clin Pharmacol. 2014 Jun;77(6):958-64. doi: 10.1111/bcp.12283. PubMed 24219102 ↗
  • Hall PM. Nephrolithiasis: treatment, causes, and prevention. Cleve Clin J Med. 2009 Oct;76(10):583-91. doi: 10.3949/ccjm.76a.09043. PubMed 19797458 ↗
  • HANLEY T, PLATTS MM. Observations on the metabolic effects of the carbonic anhydrase inhibitor diamox: mode and rate of recovery from the drug's action. J Clin Invest. 1956 Jan;35(1):20-30. doi: 10.1172/JCI103248. No abstract available. PubMed 13278397 ↗
  • Mirza N, Marson AG, Pirmohamed M. Effect of topiramate on acid-base balance: extent, mechanism and effects. Br J Clin Pharmacol. 2009 Nov;68(5):655-61. doi: 10.1111/j.1365-2125.2009.03521.x. PubMed 19916989 ↗
  • Moher D, Liberati A, Tetzlaff J, Altman DG; PRISMA Group. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. Ann Intern Med. 2009 Aug 18;151(4):264-9, W64. doi: 10.7326/0003-4819-151-4-200908180-00135. Epub 2009 Jul 20. No abstract available. PubMed 19622511 ↗
  • Silberstein SD, Ben-Menachem E, Shank RP, Wiegand F. Topiramate monotherapy in epilepsy and migraine prevention. Clin Ther. 2005 Feb;27(2):154-65. doi: 10.1016/j.clinthera.2005.02.013. PubMed 15811478 ↗
  • Vega D, Maalouf NM, Sakhaee K. Increased propensity for calcium phosphate kidney stones with topiramate use. Expert Opin Drug Saf. 2007 Sep;6(5):547-57. doi: 10.1517/14740338.6.5.547. PubMed 17877442 ↗
  • Wile D. Diuretics: a review. Ann Clin Biochem. 2012 Sep;49(Pt 5):419-31. doi: 10.1258/acb.2011.011281. Epub 2012 Jul 10. PubMed 22783025 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Jan 2018; primary completion for Dec 2018, 11 months later.

Of 337 non-industry interventional studies with no phase under Epilepsy, half reached primary completion within 42 months of starting (the median), counting those still running; a quarter within 19 and three quarters within 77. This study's planned 11 months is below that.

Counting every sponsor, half of 358 studies reached it within 42 months; a quarter within 19 and three quarters within 77.

How these figures are worked out, and which studies are left out of them.

Registered
Nov 21, 2017
First posted
Nov 28, 2017
StartEst.
Jan 2018
Primary completionEst.
Dec 2018
CompletionEst.
Dec 2018
Last update
Nov 28, 2017
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 28, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03354507
Lead sponsor
McMaster Children's Hospital
Responsible party
Mandeep Sidhu (Resident Physician, McMaster Children's Hospital) — Principal investigator
First posted
Nov 28, 2017
Start date
Jan 2018 (estimated)
Primary completion
Dec 2018 (estimated)
Completion
Dec 2018 (estimated)
Last update
Nov 28, 2017

Study contacts

Mandeep Sidhu, MD
Contact
mandeep.sidhu@medportal.ca
19055212100 ext. 6924
Surejini Tharmaradinam, MD
Contact
surejini.tharmaradinam@medportal.ca
19055212100 ext. 6760

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Nov 2017. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: Sodium Bicarbonate

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