Efficacy of lower doses of pioglitazone after stroke or transient ischaemic attack in patients with insulin resistance.

Abstract

AIMS:

Pioglitazone is a potent insulin-sensitizing drug with anti-atherosclerotic properties, but adverse effects have limited its use. We assessed the benefits and risks of lower versus higher doses of pioglitazone taken by participants in the Insulin Resistance Intervention in Stroke Trial.

MATERIALS AND METHODS:

Efficacy [myocardial infarction (MI) or recurrent stroke] new-onset diabetes) and adverse outcomes (oedema, weight gain, heart failure and bone fracture) were examined for subjects assigned to pioglitazone or placebo within strata defined by mode dose of study drug taken (i.e. the dose taken on most days in the study).

RESULTS:

Among the 1938 patients randomized to pioglitazone, the mode dose was <15 mg/day in 546 participants, 15 mg/day in 128, 30 mg/day in 89, and 45 mg/day in 1175. There was no significant effect on stroke/MI or new-onset diabetes with <15 mg/day. For 15 mg/30 mg/day pooled, the adjusted hazard ratios (95% CI) for stroke/MI were 0.48 (0.30, 0.76; p = .002) and 0.74 (0.69, 0.94) for 45 mg/day. For new-onset diabetes, the adjusted hazard ratios were 0.34 (0.15, 0.81; p = .001) and 0.31 (0.59, 0.94; p = .001) respectively. For oedema, weight gain and heart failure, the risk estimates for pioglitazone were lower for subjects taking <45 mg daily. For fractures, the increased risk with pioglitazone was similar across all dose strata.

CONCLUSIONS:

Lower doses of pioglitazone appear to confer much of the benefit with less adverse effects than the full dose. Further study is needed to confirm these findings so that clinicians may optimize dosing of this secondary prevention strategy in patients with stroke.

• Authors: J David Spence, Catherine Viscoli, Walter N Kernan, Lawrence H Young, Karen Furie, Ralph DeFronzo, Muhammad Abdul-Ghani, Paresh Dandona, Silvio E Inzucchi
• Journal: Diabetes, obesity & metabolism (Diabetes Obes Metab) Vol. 24 Issue 6 Pg. 1150-1158 (06 2022) ISSN: 1463-1326 [Electronic] England
• PMID: 35253334 (Publication Type: Journal Article, Review, Research Support, N.I.H., Extramural)
• Copyright: © 2022 John Wiley & Sons Ltd.

Chemical References

• Hypoglycemic Agents
• Thiazolidinediones
• Pioglitazone

Topics

• Diabetes Mellitus (drug therapy)
• Diabetes Mellitus, Type 2 (drug therapy)
• Heart Failure (complications)
• Humans
• Hypoglycemic Agents (adverse effects)
• Insulin Resistance
• Ischemic Attack, Transient (drug therapy, epidemiology, prevention & control)
• Myocardial Infarction (complications, drug therapy, epidemiology)
• Pioglitazone (therapeutic use)
• Randomized Controlled Trials as Topic
• Stroke (drug therapy, epidemiology, etiology)
• Thiazolidinediones (adverse effects)
• Weight Gain