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ORIGINAL ARTICLE
ANTIHYPERTENSIVE DRUG USE IN DIABETICS: A DRUG
UTILIZATION STUDY
Limaye R. P1, Ghaisas M. M2, Naik S. A3, Kadam M. S4, Sonavane R. N5
HOW TO CITE THIS ARTICLE:
Limaye R. P, Ghaisas M. M, Naik S. A, Kadam M. S, Sonavane R. N. “Antihypertensive Drug use in
Diabetics: A Drug Utilization Study”. Journal of Evidence based Medicine and Healthcare; Volume 1, Issue
12, November 24, 2014; Page: 1542-1552.
ABSTRACT: INTRODUCTION AND BACKGROUND: Diabetes is a multisystem metabolic
disorder complicated by concurrent presence of hypertension. Patients with both disorders have
multifold chances of developing complications. Appropriate treatment of hypertension is known to
reduce the prevalence of this occurrence. Hence the study was planned to study the
antihypertensive drug utilization in diabetics. Such drug utilization studies help in providing
evidence for intervention in present therapeutic trends. METHODS: Observational study, carried
in consenting patients from Pune and Sangli from September 2013 to January 2014. In a
predefined format information regarding use of drugs was recorded. No personally identifiable
information was collected. For the purpose of approaching and interviewing the patients,
information from tertiary care hospital registers/database was used. Hospitals involved were
Bharati Hospital and YCM Hospital. RESULTS: Majority of patients were from age group 61-70 yr.
Most prescribed drug was angiotensin II receptor inhibitor, olmesartan (53.33%) in monotherapy
and telmisartan in combination with calcium channel blocker viz. amlodipine (60%). Only 6%
patients received aspirin while 13% received lipid lowering agents. CONCLUSIONS: Majority of
the patients received angiotensin receptor blockers in monotherapy and calcium channel blockers
in multidrug therapy. This pattern was not exactly according to the present guidelines but was
not irrational. However use of aspirin and lipid lowering agents was very low as compared to
expectations and guidelines.
KEYWORDS: anti-hypertensive, diabetics, drug utilization.
INTRODUCTION: Diabetes is a chronic metabolic disorder which is characterized by high blood
sugar level, either because the pancreas does not produce enough insulin, or because cells do not
respond to the insulin that is produced. Diabetes and hypertension frequently occur together.1
Hypertension and diabetes are two of the leading risk factors for atherosclerosis and its
complications, including heart attacks and strokes1.They share certain physiological traits – that
is, the effects caused by each disease tend to make the other disease more likely to occur, some
of these effects include: Increased fluid volume –Increased arterial stiffness - Impaired Insulin
Handling – Changes in the way the body produces and handles insulin can directly cause increase
in blood pressure.1,2,3
Hypertension (defined as a blood pressure ≥140/90 mm Hg) is an extremely common
comorbid condition in diabetes, affecting 20–60% of patients with diabetes, depending on
obesity, ethnicity, and age.4 In type 2 diabetes, hypertension is often present as part of the
metabolic syndrome of insulin resistance also including central obesity and dyslipidemia.4 In type
1 diabetes, hypertension may reflect the onset of diabetic nephropathy.
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ORIGINAL ARTICLE
Hypertension substantially increases the risk of both macrovascular and microvascular
complications, including stroke, coronary artery disease, and peripheral vascular disease,
retinopathy, nephropathy, and possibly neuropathy.5,6,7
In recent years, adequate data from well-designed randomized clinical trials have
demonstrated the effectiveness of aggressive treatment of hypertension in reducing both types of
diabetic complications.4Diabetes increases the risk of coronary events twofold in men and fourfold
in women.4 A part of this increase is due to the frequency of associated cardiovascular risk factors
such as hypertension, dyslipidemia, and clotting abnormalities.8,9,10
In observational studies people with both diabetes and hypertension have approximately
twice the risk of cardiovascular disease as non-diabetic people with hypertension,4 Hypertensive
diabetic patients are also at increased risk for diabetes-specific complications including
retinopathy and nephropathy.
Hence it is essential to monitor the prescribing pattern of antihypertensive drugs in
patients suffering from diabetes and hypertension with respect to mono therapy, multi therapy,
use of FDC’s etc. to avoid further complications.
METHODS: The antihypertensive drug prescribing pattern data was collected, from September
2013 to January 2014, from the patients, whose names were obtained from tertiary care hospitals
from Pimpri Chinchwad, Pune, Sangli, (YCM Hospital and Bharati Hospital, respectively), were
included in this study according to the inclusion and exclusion criteria.
INCLUSION CRITERIA:
 Patients consenting to participate in the study.
 Patients having diabetes and hypertension and receiving treatment for it from a physician.
EXCLUSION CRITERIA: Patient suffering from any other disease in addition to diabetes and
hypertension.
STUDY DESIGN: Observational cross sectional.
STUDY PERIOD: Five months (No. of patients interviewed were 3475, consent was rejected by
183 patients, excluded patients were 292, included were 3000).
STUDY PLACE: Pimpri Chinchwad, Pune & Sangli (Patient interview).
SAMPLE DESIGN: Random purposive sampling. The observations were analyzed for descriptive
statistics and expressed as %.
RESULTS: Age wise distribution of patients Table-1.
 It was observed that diabetes and hypertension largely occurs in patient of 61-70 years
(30.61%).
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




It was observed that angiotensin II receptor blockers (30%) were prescribed mainly by the
physician–Table 2.
It was observed that combination of (calcium channel blocker + angiotensin II receptor
Blocker) 32.25% were mainly prescribed by physician (Table no.3).
Fixed Dose Combination use- It was observed that fixed dose combinations of (Calcium
channel blockers + angiotensin II receptor blocker) 45.45% were mainly prescribed -(Table
4).
It was observed that in only 6% cases aspirin was prescribed.
It was observed that in only 13.11% cases lipid lowering drugs were prescribed.
DISCUSSION: There are a number of trials demonstrating the superiority of drug therapy
versus placebo in reducing outcomes including cardiovascular events and micro vascular
complications of retinopathy and progression of nephropathy. These studies used different drug
classes, including angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers
(ARBs), diuretics and β-blockers, as the initial step in therapy.
All of these agents were superior to placebo; however, it must be noted that many
patients required three or more drugs to achieve the specified target levels of blood pressure
control. Overall there is strong evidence that pharmacologic therapy of hypertension in patients
with diabetes is effective in producing substantial decreases in cardiovascular and micro vascular
diseases.1,7,11 The study of patterns of antihypertensive use in patients with diabetes and
hypertension was done to evaluate whether they were consistent with evidence-based practice
guidelines and to find out what were the prevailing patterns.12,13,14
In monotherapy angiotensin II receptor (AT II) blockers (ARBs) were prescribed
maximum. Evidence from several trials and meta-analysis clearly suggested that ACE inhibitors
are better than any other class of antihypertensive in protecting against progressive renal
damage. According to the analysis in our study in about 18 % cases ACEI’s were prescribed.
The rising use of ACE inhibitors may be explained by their substantial benefits in
congestive heart failure and diabetes as JNC VI recommends this drug class as the first-line
treatment for hypertensive with these conditions. Studies demonstrate the benefits of ACE
inhibitors on multiple adverse outcomes in patients with diabetes, including both macrovascular
and microvascular complications, in patients with either mild or more severe hypertension and in
both type 1 and type 2 diabetes, the established practice of choosing an ACE inhibitor as the firstline agent in most patients with diabetes is reasonable.
The use of angiotensin-converting enzyme inhibitors (ACEI) can prevent the progression
of renal damage and delay progression to end-stage renal disease in addition to lowering BP.
Thus, it has been suggested that all diabetic patients with BP greater than 130/80 mm Hg should
begin ACEI treatment unless contraindicated.15,16,17,18,19,20,21 Our study indicated a limited
congruency to this principle.
In patients with microalbuminuria or clinical nephropathy, both ACE inhibitors and ARBs
are considered first-line therapy for the prevention of and progression of nephropathy. However,
other strategies including diuretic and β-blocker–based therapy are also supported by
evidence.20,22
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In our study we cannot conclude whether this principle was followed meticulously or not,
as some data regarding nephropathy in many patients was absent or the patient was not
evaluated repeatedly.
It was also observed that non-selective β blockers were prescribed in some cases (10) in
our study. But according to JNC VIII guidelines nonselective β blockers should not be prescribed
in diabetic patients as they mask the hypoglycaemic effects in patients.23
Hypertension is a major risk factor for stroke, heart failure, coronary heart disease, and
end-stage renal disease. Hypertension is also commonly associated with diabetes and chronic
renal failure generally. For management of hypertensive with these comorbidities, both JNC VI
and JNC VII guidelines recommend ACE inhibitors as the preferred drug for hypertension in the
setting of CKD, diabetes, or congestive heart failure; ACE inhibitors or diuretics for recurrent
stroke prevention; and β-blockers for those with prior myocardial infarction.
In our study, it is observed that the ACE inhibitors, angiotensin receptor blockers, diuretics
along with calcium channel blockers and beta blockers were prescribed but the guideline
congruency appeared limited. (We deduce it limited because: only about 40% of patients
received the drugs exactly as per guidelines. However in others whether it was prompted by
other factors like patient tolerance, adverse effects appearance could not be evaluated due to
lack of exact data and history.)
Use of multiple drugs in combinations is being increasingly recognized as critical to control
hypertension in patients with diabetes. Fixed-dose combination (FDC) therapies offer a means to
simplify complex treatment regimens, and have several advantages that help patients reach their
glycaemic goals. Recently, several large clinical trials demonstrated that most patients with
hypertension can achieve and sustain adequate blood pressure control only with the use of
multiple antihypertensive drugs. Initiating drug therapy with a diuretic, either alone or in
combination with an agent from another drug class apparently provides the best outcomes for
hypertension management as per the JNC VII and JNC VIII guidelines.
According to the analysis in our study, combination of calcium channel blockers + AT II
blockers was maximum prescribed (as advocated in the JNC VIII guidelines). Also combination of
Calcium channel blockers+ diuretics were prescribed (as advocated in the JNC VIII guidelines). As
advocated in the guidelines the combination of ACE inhibitors and AT II blockers were not seen to
be prescribed.
Unacceptable combinations are non-dihydropyridine calcium blockers (such as verapamil
or diltiazem) and beta-blockers, dual renin–angiotensin system blockade (e.g. angiotensin
converting enzyme inhibitor + angiotensin receptor blocker), renin–angiotensin system blockers
and beta-blockers, beta-blockers and centrally acting agents. Combinations of an ACE-inhibitor or
angiotensin II–receptor antagonist, a diuretic and an NSAID (including selective COX-2 inhibitors
and non-prescribed drugs such as ibuprofen) should be avoided whenever possible due to a high
documented risk of acute renal failure. We did find such prescriptions in our study and hence
excluded from analysis.
Aspirin has been found to be of benefit overall in those at low risk of heart disease as the
risk of serious bleeding is equal to the benefit with respect to cardiovascular problems because
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aspirin has antiplatelet properties. In the present study, it was observed that only in 6% cases
aspirin was prescribed.
Statins are effective in preventing further cardiovascular disease in people with a history
of cardiovascular disease. In the patients without cardiovascular disease but having other risk
factors, statins appear to be beneficial with decrease in mortality rate and further heart diseases.
Large-scale randomized trials have shown that lipid-lowering with HMG-CoA reductase inhibitors
(statins) reduce relative risk for cardiovascular events or death, both in primary and in secondary
prevention. The time course over which statins provide prevention against death appears to be
long, of the order of one year, which is much longer than the duration of their effect on lipids, a
hypothesis put forth by Borghiet.al 2007.24 In the present study only 13.11% cases were
prescribed lipid lowering drugs.
As per World Health Organization, around 31.7 million individuals in India were affected
by diabetes during the year 2000 which may further rise to 79.4 million by the year 2030. Poor
management of diabetes and hypertension leads to several complications.25 In developing
countries such as India, the focus for long has been on the control of acute and chronic infections
and communicable diseases. Mortality data from Global Burden of Diseases Studies has revealed
that cardiovascular diseases, especially coronary heart disease are important causes of death.
Worldwide, of the 17.5 million deaths from cardiovascular diseases, 20% deaths occurred in high
income countries, 8% in upper-middle income countries, 37% in lower-middle income countries
and 35% in low income countries including India. In many regions of these countries
cardiovascular diseases, especially coronary heart disease, are more prevalent among the
illiterate and low socioeconomic subjects.
Many of the standard coronary risk factors such as smoking and tobacco use, low physical
activity, high dietary fat intake, uncontrolled hypertension, uncontrolled hypercholesterolemia and
diabetes are also more.26 In this context, it is important to note the patterns of antihypertensive
treatment and follow them for any association with increase in comorbid conditions or mortality if
possible. Our study initiates the first part of it and tries to identify areas of concern. If these facts
are communicated properly, it may help in bridging the gap between guidelines and actual
prescribing. May be appropriate interventions can also be suggested. Exact and meticulous
documentation may also be needed to help such studies or such interventions, as we suffered to
deduce some inferences because of lack of such information.
CONCLUSIONS: In conclusion, findings suggest that angiotensin receptor blockers were
prescribed in maximum patients but as per the JNC VIII guidelines the thiazide diuretics should
be the first line treatment in hypertension with diabetes. Thus it was observed that the guidelines
for treatment were not exactly followed.
Anti-hypertensive use in multidrug regimens was generally consistent with JNC VIII
guidelines. It was also observed that non-selective β blockers were prescribed in some cases. But
according to JNC VIII, non-selective β blockers should not be prescribed in diabetic patients as
they mask the hypoglycaemic effects in patients.23
Calcium channel blockers and AT II blockers were the maximum prescribed combinations
in FDC as per the guidelines.
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Interpretation of our results must be considered along with recognition of several limitations
of the study. First, our study is retrospective and prescribing pattern having a dynamic nature
keeps on changing from time to time. Such repeated studies will be needed to comment
substantially about trends and its influences. Secondly, for further effectivity, we may require
follow up of these patients which are not covered in the study. Third we suffered to deduce
inferences on some questions because of lack of appropriate information.
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TABLES:
It was observed that diabetes and hypertension largely occurs in patient of 61-70
yrs (30.61%) followed by;
Age in years
< 30
31-40
41-50
51-60
61-70
71-80
81-90
Percentage
2
8.64
17.28
23.45
30.61
14.81
3.70
Table 1: Age wise drug use distribution
It was observed that angiotensin II receptor blockers (olmesartan, telmisartan,
losartan) (30%) were prescribed mainly by the physician followed by;
Category of drug
Percentage%
Calcium channel blockers Amlodipine
22
ACE Inhibitors
18
(Enalapril, ramipril, lisinopril, levipril)
Diuretics
14
(Furesamide, torsemide)
β Blockers(Atenolol)
8
+
K opener(Nicorandil)
2
Table 2: Category wise drug use distribution
It was observed that combination of (calcium channel blocker + angiotensin II
receptor [AT II] blocker) 32.25% were mainly prescribed by physician followed by;
Category of drug
Percentage
AT II Blocker +Diuretics
25.80
ACE Inhibitors +Diuretics
9.67
B blocker + Calcium channel blocker
9.67
Calcium channel blocker + ACE Inhibitor
6.45
AT II Blocker +ACE Inhibitors
6.45
Calcium channel blocker+ Diuretics
6.45
B Blocker +AT II Blocker
6.45
Table 3: Combination drug use distribution
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It was observed that fixed dose combinations of (Calcium channel blockers +
angiotensin II receptor blocker) 45.45% were mainly prescribed followed by;
Category of drug
Percentage (%)
β blockers + diuretics
27.27
ACE inhibitors+ diuretics
18.18
AT II blocker + diuretics
9.09
Table 4: FDC drug use distribution
Age wise distribution of patients
Pattern of drug utilization – mono therapy
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Pattern of drug utilization – multi therapy
Pattern of drug utilization - FDC
Use of aspirin
It was observed that in only 6% cases aspirin was prescribed.
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Lipid lowering drugs prescribed or not
It was observed that in only 13.11% cases lipid lowering drugs were prescribed.
AUTHORS:
1. Limaye R. P.
2. Ghaisas M. M.
3. Naik S. A.
4. Kadam M. S.
5. Sonavane R. N.
PARTICULARS OF CONTRIBUTORS:
1. Professor, Department of Pharmacology,
BVDUMC & H, Sangli.
2. Professor, Department of Pharmacology,
SCE’s Indira College of Pharmacy, Pune,
Maharashtra, India.
3. Post Graduate Student, Department of
Pharmacology, SCE’s Indira College of
Pharmacy, Pune, Maharashtra, India.
4. Post Graduate Student, Department of
Pharmacology, SCE’s Indira College of
Pharmacy, Pune, Maharashtra, India.
5. Post Graduate Student, Department of
Pharmacology, SCE’s Indira College of
Pharmacy, Pune, Maharashtra, India.
NAME ADDRESS EMAIL ID OF THE
CORRESPONDING AUTHOR:
Dr. R. P. Limaye,
Department of Pharmacology,
Bharati Vidyapeeth DU Medical College & Hospital,
Sangli, Maharashtra, India.
E-mail: rplimaye@gmail.com
Date
Date
Date
Date
of
of
of
of
Submission: 12/09/2014.
Peer Review: 13/09/2014.
Acceptance: 07/11/2014.
Publishing: 21/11/2014.
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Page 1552
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