allhat
DESCRIPTION
ALLHAT. Angioedema in the Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial (ALLHAT)*. Linda Piller*, Charles Ford, Barry Davis, Chuke Nwachuku, Henry Black, Suzanne Oparil, Saib Gappy, Tamrat Retta, Jeffrey Probstfield for the ALLHAT Collaborative Research Group - PowerPoint PPT PresentationTRANSCRIPT
Angioedema in the Antihypertensive and Lipid-
Lowering Treatment to Prevent Heart Attack Trial (ALLHAT)*
Linda Piller*, Charles Ford, Barry Davis, Chuke Nwachuku, Henry Black, Suzanne Oparil, Saib Gappy, Tamrat Retta,
Jeffrey Probstfieldfor the ALLHAT Collaborative Research Group
Sponsored by the National Heart, Lung, and Blood Institute (NHLBI)
*The University of Texas School of Public HealthHouston, Texas
ALLHAT
www.allhat.org *J Clin Hypertens 2006;8:649-656
Abstract
ALLHAT, the largest antihypertensive study conducted to date, randomized 42,418 participants to one of four antihypertensive drug classes/drugs (diuretic/chlorthalidone, calcium-channel blocker/amlodipine, angiotensin-converting enzyme (ACE) inhibitor/lisinopril, and alpha-blocker/doxazosin), with 9054 participants assigned to lisinopril. This large patient sample, combined with the double-blind design of ALLHAT, provides a large and diverse population in which to further examine the occurrence of angioedema, a rare but potentially life-threatening side effect of ACE-inhibitors. The purpose of this presentation is to describe the characteristics, both within and between treatment groups, of treated hypertensive participants with angioedema.
Patients who developed angioedema during ALLHAT were compared for baseline characteristics and for the temporal relationship of changes in antihypertensive drug administration to the onset of angioedema. Results were as follows: Fifty-three ALLHAT participants developed angioedema during active follow-up in ALLHAT. Of these, 55% were black, 60% male, 70% were assigned to the ACE-inhibitor lisinopril (0.83 events per 1000 person-years), 15% to chlorthalidone (0.11 events per 1000 person-years), 9% to doxazosin (0.17 events per 1000 person-years), and 6% to amlodipine (0.07 events per 1000 person-years). Three cases (6%) occurred within a day of randomization, 22% within the first week, 34% within the first month, and 68% within the first year. In addition, 3 patients (6%) had a dose increase of their assigned medication within a week prior to onset, but over half (51%) had no prior dose increase. One patient died following the angioedema onset. The occurrence of angioedema cases in the ACE-inhibitor arm of ALLHAT corresponds with the previously reported association of angioedema and ACE-inhibitor use.
ALLHAT
ACE-Inhibitors: Background
• Introduced in the early 1980’s for treatment of refractory hypertension
• Side effects– Persistent, nonproductive cough (5-6% of patients)– Angioedema (0.1-0.7% of patients)
• 2-4 times more frequent in Black patients• Life-threatening if respiratory compromise• The OCTAVE (“Omapatrilat Cardiovascular Treatment vs.
Enalapril”) trial* reported the largest series of angioedema cases associated with ACE-inhibitor use, and ALLHAT reported the largest number of Black participants in which to study angioedema associated with ACE-inhibitors.
• Also associated with other etiologies, including aspirin, NSAID, penicillin, ARBs, and peanuts
ALLHAT
*Am J Hypertens 2004;17:103-111
Angioedema and ACE-Inhibitors: ALLHAT* vs. OCTAVE†
• 9054 assigned to lisinopril, including 3210 black participants (35%)
• Angioedema reported as a safety (serious adverse) event; no committee adjudication
• 37/9,054 (0.41%) reported angioedema (23/3,210 [0.72%] of Black participants)
• 12,634 assigned to enalapril, including 1247 black participants (10%)
• Angioedema reported as a study endpoint; all reports adjudicated by a committee blinded to RX
• 86/12,634 (0.68%) reported angioedema (20/1237 [1.62%] of Black participants)‡
ALLHAT ACE-inhibitor arm OCTAVE ACE-inhibitor arm
*JAMA 2002; 288:2981-2997 †Am J Hypertens 2004;17:103-111 ‡Arch Int Med, in press (with permission)
ALLHAT
African American Patients and ACE-Inhibitors: Background
• Prevalence, severity, and impact of hypertension are increased in African Americans.
• African American patients demonstrate decreased response to some monotherapy agents, including ACE-inhibitors, compared to CCBs and diuretics, in lowering blood pressure.
• Angioedema secondary to ACE-inhibitors occurs 2-4 times more often in African American patients than in other groups.
From JNC 7, 2003
ALLHAT
Rationale and Objective
With 42,418 participants, including 9,054 participants (3,210 black participants) assigned to the ACE-inhibitor lisinopril treatment group, ALLHAT provides the second largest series of patients in which to study ACE-inhibitor associated angioedema and the largest series in which to study ACE-inhibitor associated angioedema among Black participants.
This presentation will describe the characteristics of participants who developed angioedema while in ALLHAT.
ALLHAT
Antihypertensive Trial Design
• Randomized, double-blind, active-controlled clinical trial
• Purpose: To determine whether the occurrence of fatal CHD or nonfatal MI is lower for high-risk hypertensive patients treated with newer agents (CCB, ACEI, alpha-blocker) compared with a diuretic
• 42,418 high-risk hypertensive patients ≥ 55 years, from 623 clinical centers
• Conducted from February, 1994, through March, 2002
• Large, simple trial
ALLHAT
Antihypertensive Trial42,418 high-risk
hypertensive patients
Chlorthalidonen=15,255
Amlodipinen=9,048
Lisinopriln=9,054
Doxazosinn=9,061
8 patients (0.05%)with angioedema
3 patients (0.03%)with angioedema
37 patients(0.41%)with angioedema
5 patients (0.06%)with angioedema
6 White
2 Black
1 White
2 Black
13 White
23 Black
1 Asian/Pacific Islander
3 White
2 Back
ALLHAT
1 with priorACE-I use
1 with priorACE-I use
Mean follow-up time: 4.9 years for chlorthalidone, amlodipine, and lisinopril treatment groups; 3.3 years for doxazosin treatment group
Symptoms of Angioedema
• Swelling beneath the skin, subcutaneous tissues, and mucous membranes
• Typical involvement of face, lips, or glossopharyngeal areas– Involvement of larynx, glottis, or tongue can
produce airway obstruction– Respiratory compromise may be life-threatening
• Occasional involvement of hands, feet, or abdominal viscera
ALLHAT
Baseline Characteristics of Participants with Angioedema
Assigned (Step 1) Treatment Group
Chlor Amlod Lisin Doxaz
No. randomized 15,255 9,048 9,054 9,061
No. w/angioedema (% of rz) 8 (0.05) 3 (0.03) 37 (0.41) 5 (0.06)
Female, n (%) 5 (62.5) 0 13 (35) 3 (60)
Black, n (%) 2 (25) 2 (66.7) 23 (62) 2 (40)
BP treatment
Untreated at BL 2 (25) 0 3 (8) 0
Treated > 2 mos 6 (75) 3 (100) 34 (92) 5 (100)
Current/past smoker 6 (75) 2 (67) 27 (73) 4 (80)
*Baseline characteristics are given as number of participants with angioedema in a given treatment group and percentage of total participants with angioedema in that group.
ALLHAT
Baseline Characteristics of Participants with Angioedema (2)
Assigned (Step 1) Treatment Group
Chlor Amlod Lisin Doxaz
No. w/angioedema (% of rz) 8 (0.05) 3 (0.03) 37 (0.41) 5 (0.06)
Hx. of diabetes 1 (13) 0 4 (11) 1 (20)
Hx. aspirin use, n (%) 2 (25) 1 (33) 14 (38) 2 (40)
BMI, kg/m2, mean (SD) 29.0 (5.2) 31.7 (8.2) 29.4 (7.6) 29.0 (9.0)
Serum creatinine* 0.90 (0.14) 0.97 (0.06) 1.08 (0.33) 0.94 (0.15)
Serum potassium† 4.1 (0.44) 4.1 (0.50) 4.4 (1.93) 3.9 (0.48)
*mg/dl, mean (SD) †mEq/dl, mean (SD)
ALLHAT
Baseline Characteristics of Participants with Angioedema Assigned to Step 1
Lisinopril vs. Entire Step 1 Lisinopril Cohort
Step 1 Lisinopril Treatment Group
Participants with angioedema
(n=37)
Total cohort* (n=9054)
Age, mean (SD), years 66.59 (8.35) 66.9 (7.7)
Female, n (%) 13 (35.1) 4187 (46.2)
Black, n (%) 23 (62.16) 3210 (35.5)
BP treatment at baseline, n (%) 34 (91.9) 8164 (90.2)
Current smoker, n (%) 14 (37.8) 1981 (21.9)
Hx. of diabetes, n (%) 4 (10.8) 3212 (35.5)
Hx. of CHD, n (%) 10 (27.0) 2270 (25.3)
Fasting glucose, mean (SD), mg/dl 106.68 (28.72) 122.9 (56.1)
Serum potassium, mean (SD) mg/dl 4.4 (1.93) 4.4 (0.70)
Aspirin use 14 (37.8) 3258 (36.0)
ALLHAT
*JAMA 2002; 288:2981-2997
Race Distribution by Treatment Group of Participants with
Angioedema
0%
20%
40%
60%
80%
100%
Chlor n=8
Amlod n=3
Lisin n=37
Doxaz n=5%
of
an
gio
ed
em
a p
art
icip
an
ts in
tr
ea
tme
nt
gro
up
White Black Asian/Pacific
6/8
2/81/3
2/3
13/37
23/37
1/37
3/5
2/5
ALLHAT
Time from Randomization to Onset of Angioedema*
Number of Patients (%)
Chlorthalidone Amlodipine Lisinopril Doxazosin
Within 1 week 2 (25%) 0 8 (22%) 2 (40%)
Within 1 month 2 (25%) 0 13 (35%) 3 (60%)
Within 1 year 2 (25%) 3 (100%) 27 (73%) 5 (100%)
1 year incidence 0.01% 0.03% 0.30% 0.06%
> 1 year 6 (75%) 0 10 (27%) 0
Total w/angioedema (% of randomized)
8 (0.05%) 3 (0.03%) 37 (0.41%) 5 (0.06%)
Total randomized 15,255 9,048 9,054 9,061
*For participants with >1 angioedema episode, only the first is considered.
ALLHAT
Time from Most Recent Step 1 Dose Increase to Onset of
Angioedema*Number of Patients
Chlorthalidone Amlodipine Lisinopril Doxazosin
Within 1 week 0 1 2 0
Within 1 month 0 2 6 1
Within 1 year 2 3 12 2
> 1 year 2 0 5 0
Total with dose increase
4 (50%) 3 (100%) 17 (46%) 2 (20%)
No dose increase 4 (50%) 0 20 (54%) 3 (60%)
*For participants with >1 angioedema episode, only the first is considered.
ALLHAT
Clinical Status of Participants Following Angioedema*
Number of Patients (%)
Chlorthalidone Amlodipine Lisinopril Doxazosin
Recovered 6 (75%) 3 (100%) 32 (87%) 5 (100%)
Alive with sequelae 1 (13%) 0 0 0
Under treatment for sequelae
1 (13%) 0 4 (11%) 0
Death 0 0 1 (3%) 0
Total w/angioedema 8 3 37 5
*At time of angioedema report
ALLHAT
Although ALLHAT provided the largest series of patients in which to study ACE-I associated angioedema, the OCTAVE (“Omapatrilat Cardiovascular Treatment vs. Enalapril”) trial* reported the largest series of angioedema cases associated with ACE-inhibitor use.
*Am J Hypertens 2004;17:103-111
ALLHAT
Angioedema and ACE-Inhibitors: ALLHAT* vs. OCTAVE†
• 9054 assigned to lisinopril, including 3210 black participants (35%)
• Angioedema reported as a safety (serious adverse) event; no committee adjudication
• 37/9,054 (0.41%) reported angioedema (23/3,210 [0.72%] black participants)
• 12,634 assigned to enalapril, including 1247 black participants (10%)
• Angioedema reported as a study endpoint; all reports adjudicated by a committee blinded to RX
• 86/12,634 (0.68%) reported angioedema
ALLHAT ACE-inhibitor arm OCTAVE ACE-inhibitor arm
*JAMA 2002; 288:2981-2997 †Am J Hypertens 2004;17:103-111
ALLHAT
Conclusions
• ALLHAT confirms the previously reported increased risk of ACE-inhibitor associated angioedema in Black patients.
• Angioedema is a measurable risk of ACE-inhibitor treatment, and treating physicians should be especially vigilant for even the mildest signs and symptoms.
• Recognition of angioedema is imperative and necessitates immediate and permanent discontinuation of ACE-inhibitors.
ALLHAT