What does the TIME study tell us about morning and evening dosing of antihypertensive medication?

Teck K Khong1,2, George S Lin3

  • 1Clinical Pharmacology, St George's University of London, London, UK tkhong@sgul.ac.uk.

Insights

Taking blood pressure medication in the evening may improve cardiovascular outcomes. This study found no significant difference in major adverse cardiovascular events between morning and evening dosing in hypertensive adults.

Area of Science:

  • Cardiovascular Medicine
  • Clinical Trials
  • Hypertension Management

Background:

  • Hypertension is a leading risk factor for cardiovascular disease.
  • Optimal timing for antihypertensive medication is debated, potentially impacting treatment efficacy.
  • The TIME study investigated the effect of dosing time on cardiovascular outcomes in hypertensive patients.

Purpose of the Study:

  • To determine if evening dosing of antihypertensives is superior to morning dosing for cardiovascular event prevention.
  • To assess the impact of medication timing on major adverse cardiovascular events (MACE).

Main Methods:

  • A prospective, randomised, open-label, blinded-endpoint clinical trial.
  • Involved adults with hypertension using their usual antihypertensive medications.
  • Participants were assigned to either morning or evening dosing schedules.

Main Results:

  • No statistically significant difference in the primary endpoint of major adverse cardiovascular events between evening and morning dosing groups.
  • Blood pressure control was similar between the two dosing groups.
  • Adherence to medication was also comparable across both groups.

Conclusions:

  • Current evidence does not support a routine change in antihypertensive dosing time from morning to evening.
  • Dosing time of antihypertensives may not significantly influence major cardiovascular outcomes.
  • Further research may be needed to explore specific patient subgroups or alternative dosing strategies.

Related Concept Videos

Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response01:15

Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response

Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
102
Dosage Regimen: Fixed Dose01:01

Dosage Regimen: Fixed Dose

Fixed-dose regimens are a common approach to administer drugs to achieve and maintain desired levels of the drug in the body. In this dosing strategy, a specific amount of medication is given at regular intervals, often multiple times a day, to ensure a consistent drug concentration in the bloodstream.
Fixed-dose regimens can be used for various routes of administration, including intravenous (IV) injections and oral medications. For IV administration, a predetermined amount of the drug is...
1.9K
Hypertension IV: Drug Therapy and Lifestyle Modifications01:28

Hypertension IV: Drug Therapy and Lifestyle Modifications

Multiple classes of antihypertensive medications are employed in treating hypertension. The most commonly recommended first-line treatments include:Thiazide Diuretics, such as chlorthalidone, increase sodium and water excretion from the body, reducing blood volume and blood pressure.Angiotensin-converting enzyme inhibitors, like lisinopril, block the conversion of angiotensin I to II, a potent vasoconstrictor lowering blood pressure.Angiotensin II Receptor Blockers (ARBs) prevent angiotensin II...
26
Time Course of Drug Effect01:14

Time Course of Drug Effect

The progression of a drug's impact can be analyzed by examining both the concentration-time course and the effect-time course. The concentration-time course is determined by the drug's half-life and is influenced by factors such as its pharmacokinetics, including absorption, distribution, metabolism, and elimination. The effect of the drug is often related to its concentration in the plasma and is calculated using the maximum drug effect and the plasma concentration that generates 50...
2.1K
Rational Dosage Regimen: Maintenance Dose and Loading Dose01:24

Rational Dosage Regimen: Maintenance Dose and Loading Dose

A rational dosage regimen considers a drug's pharmacokinetics, including its absorption, distribution, metabolism, and elimination from the body. By understanding these factors, the appropriate dosage can be determined, and the dosing schedule can be designed to achieve and maintain the desired therapeutic effect while minimizing adverse effects.
In most cases, drugs are administered repetitively or infused continuously to maintain a steady-state concentration in the body. At a steady...
4.2K
Drug Dosage Regimen: Overview01:15

Drug Dosage Regimen: Overview

A drug dosage regimen describes the specific instructions and schedule for administering a drug to a patient. It considers factors such as drug dosage, frequency, route of administration, and duration of treatment. Designing an appropriate dosage regimen for a patient aims to achieve a target drug concentration at the site of action.
Typically, the starting dose and dosing interval are guided by the manufacturer's recommendations based on clinical trials conducted during and after drug...
3.7K