Type 2 Diabetes Mellitus
Conditions
Keywords
Moringa Oleifera tea, Type 2 Diabetes Mellitus, Metformin Steady state concentrations, Herb-drug interaction
Brief summary
Type 2 diabetes mellitus (T2DM) patients from our previous survey tend to co-administer various herbs with their oral hypoglycemic agents (OHA). Some of these herbs are known to possess antidiabetic activities. One of such is Moringa oleifera leaves. The present study evaluated the effects of seven days, twice-daily administration of hot water infusion of dried Moringa oleifera leaves on the steady state plasma concentrations of Metformin, one of the most widely used OHAs using T2DM patients who have been on Metformin for a period of not less than three months. The included patients had also been on Moringa supplementation but had terminated the use of Moringa at least a month to the start of the study. Patients who had other comorbidities such as heart diseases, renal or hepatic impairments were excluded from the study. The patients were recruited from Endocriniology clinic of the Obafemi Awolowo University Teaching Hospitals complex, a tertiary hospital from southwest Nigeria. Each patient served as his/her control.
Detailed description
Background Plant parts of Moringa oleifera Lam. (Moringaceae) is known to lower blood glucose level and as a result, type 2 diabetes mellitus patients (T2DM) sometimes use it as herbal supplements. This study therefore sought to evaluate the effects of coadministration of Moringa oleifera tea on steady state concentration of metformin in ambulatory T2DM patients attending a tertiary health facility in Nigeria. Method This study used a non-randomized pre-test and post-test design to evaluate the effects of coadministration of Moringa tea and metformin on selected parameters in T2DM patients. Consented patients, aged 49 -77 years were stabilised on the same brand of metformin for seven days. On day 8 after an overnight fast, baseline fasting blood sugar (FBG) and 2-hour post prandial blood sugar (2-hPPBG) were determined using a glucometer. Blood samples were also collected at the appropriate times for evaluation of serum creatinine, trough and peak metformin plasma concentrations. Thereafter, patients were given fourteen sachets of pre-packed 400 g dried Moringa oleifera leaves for preparation of Moringa tea for seven days (twice daily) while on their normal doses of metformin. On day 15 after an overnight fast, a repeat of FBG and 2-hPPBG was done using a glucometer. At the appropriate times, blood samples were also collected for determination of serum creatinine, trough and peak metformin plasma concentrations. Serum was obtained from aliquots of the blood samples to determine serum creatinine for calculation of estimated glomerular filtration rate, eGFR. Plasma was obtained from the blood samples and were analysed using modified previously-validated HPLC method. The values of FBG, 2-hPPBG, trough and peak metformin plasma concentrations obtained were compared with the baseline values using Paired sample t-test at P\<0.05 considered significant in order to evaluate the effect of Moringa tea on the parameters.
Interventions
DIETARY_SUPPLEMENTMoringa oleifera tea
Sponsors
Titilayo O Fakeye
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
49 Years to 77 Years
Healthy volunteers
No
Inclusion criteria
* Ambulatory type 2 diabetes mellitus patients from 40 years of age who had supplemented their oral hypoglycaemic drugs with Moringa oleifera in the past but had stopped for over one month were recruited into the study.
Exclusion criteria
* Patients with co-morbidities such as congestive heart failure, liver disease, and those who had undergone recent surgical procedure were excluded from the study. Other types of patient excluded from the study were: patients on insulin or whose oral hypoglycaemic drug therapy does not include metformin, patients who take alcohol, patients who were on cimetidine, furosemide, nifedipine, ciprofloxacin, rifampicin, anti-retroviral therapy or any other medication with known interactions with metformin. Patients who smoked were also excluded.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Fasting Blood Glucose | Change from Baseline Fasting Blood Glucose at 1 week | Blood glucose (mmol/L) after overnight fast after 7-day Moringa tea, with continuous use of metformin |
| Change in Two-hour Post Prandial Blood Glucose | Change from Baseline Two-hour Post Prandial Blood Glucose at 1 week | Blood glucose (mmol/L) two hours after breakfast after 7-day Moringa tea, with continuous use of metformin |
| Change in metformin trough plasma concentration | Change in metformin trough concentration at 1 week | Plasma level of metformin (ug/mL) pre-dose in the morning after 7-day Moringa tea, with continuous use of metformin |
| Change in metformin peak plasma concentration | Change in metformin peak concentration at 1 week | Plasma level of metformin (ug/mL) two hours post dose after 7-day Moringa tea, with continuous use of metformin |
| Change in estimated glomerular filtration rate | Change in estimated glomerular filtration rate at 1 week | Calculation of glomerular filtration rate (mL/min) from serum creatinine level, pre and post 7-day Moringa tea supplementation and continuous use of metformin |
Outcome results
None listed