digplanet beta 1: Athena
Share digplanet:


Applied sciences






















Onset of action is the duration of time it takes for a drug's effects to come to prominence upon administration. With oral administration, it typically ranges anywhere from 20 minutes to over an hour, depending on the drug in question. Other methods of ingestion such as smoking or injection can take as little as seconds to minutes to take effect. The determination of the onset of action, however, is not completely dependent upon route of administration. There are several other factors that determine the onset of action for a specific drug, including drug formulation, dosage, and the patient receiving the drug.

Effect of Administration Route on the Onset of Action[edit]

A drug's pharmacological effects can only occur once it has been fully solubilized and has entered the blood stream. For most drugs administered orally, the drug must be ingested, pass through the stomach, and into the small intestine, where the drug molecules enter the blood stream through the villi and microvilli.[1] Gastric emptying time can vary from 0 to 3 hours,[2] and therefore plays a major role in onset of action for orally administered drugs. For intravenous administration, the pathway is much shorter because the drug is administered (usually already in solution) directly to the bloodstream.


  2. ^ Bummer, Paul (2012). Gastro Intestinal Tract and Oral Drug Absorption. University of Kentucky. 

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Onset_of_action — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
67015 videos foundNext > 

Medication Onset of Action & Peak Effect

Medication Onset of Action & Peak Effect By Jason Ortiz & Eli Pumpian Pharmacology 3182.

The Increasing Incidence of Young Onset Colorectal Cancer A Call to Action

Dr. Whitney Jones from the University of Kentucky in Louisville, and Jasmine Greenamyer from the Colon Cancer Alliance in Washington, DC, discuss the article...

How to Say or Pronounce Onset Of Action

Pronounce Medical Words ― Onset Of Action

This video shows you how to say Onset Of Action. How would you pronounce Onset Of Action?

How to Say or Pronounce Onset Of Action

Get those medical secrets: http://www.health101.pw/Medical-Secrets.shtml This video shows you how to say or pronounce Onset Of Action. Audio is from cancer.gov.

Inca Onset Performance Breakthrough

The Inca Onset represents a breakthrough in flatbed inkjet technology, and has forever changed the way in which display graphics are produced.

Onset Uzi action

INCA Digital Onset Printer in Action at Tempt In-Store Productions

The most impressive flatbed Inca has introduced to date, the Onset is capable of delivering a print throughput up to 600sq.m/hr (6458sq.ft/hr), equivalent to...

Celebrity Onset and AA Action Towing

Celebrity Onset is a one hour show featuring a diverse mixture of celebrity interviews, audience participation, and contests. Celebrity Onset will extend out...

Onset S40 Live Demo with Automation Machine at FESPA 2012

Take the Onset Challenge www.onsetchallenge.com to see how you can get a return on investment within just six months of delivery. Please remember to rate thi...

67015 videos foundNext > 

90 news items

The Pharma Letter

Monthly Prescribing Reference
Thu, 18 Sep 2014 06:41:15 -0700

Vivus and Auxilium announced that the Food and Drug Administration (FDA) has approved a supplemental new drug application (sNDA) for Stendra (avanafil) to be taken ~15 minutes before sexual activity in the treatment of erectile dysfunction. Stendra ...
Seeking Alpha (registration)
Fri, 19 Sep 2014 05:56:15 -0700

Stendra has the most rapid onset of action. Since planning and timing of sexual encounters is not predictable for many, there is a very good reason to speculate that Stendra will provide a better patient experience. Therefore, Stendra may well be the ...
Thu, 18 Sep 2014 03:05:44 -0700

"We are pleased with the approval of the sNDA for STENDRA," said Seth H. Z. Fischer, Chief Executive Officer of VIVUS. "The positive clinical study results, now part of the label, demonstrate STENDRA's rapid onset of action. We believe this is good ...

RTT News

RTT News
Thu, 18 Sep 2014 11:48:29 -0700

"ED patients in my practice are looking for a safe and effective treatment option that also works fast. In my opinion, STENDRA can be an appropriate and important treatment option because the clinical trial demonstrated that it provides a rapid onset ...
Thu, 18 Sep 2014 07:48:45 -0700

VIVUS, Inc. and Auxilium Pharmaceuticals, Inc. today announced that the US Food and Drug Administration (FDA) has approved a supplemental new drug application (sNDA) for Stendra (avanafil), a phosphodiesterase type 5 (PDE5) inhibitor that treats ...
Capital OTC
Thu, 18 Sep 2014 15:52:30 -0700

He added,”The positive clinical study results, now part of the label, demonstrate STENDRA's rapid onset of action. We believe this is good news for men suffering from ED and for the healthcare providers who treat them.” The news release states approval ...
GlobeNewswire (press release)
Mon, 15 Sep 2014 15:41:15 -0700

The compound has been evaluated in CKD patients with hyperkalemia, including a two part Phase 3 study, a 12-month Phase 2 trial and a 48-hour short-term Phase 1 onset-of-action study. In all of those studies, patiromer met its efficacy endpoints and ...
Diabetes In Control
Fri, 22 Aug 2014 17:48:15 -0700

In the Phase 1 Study 3-150, the results of which were released in February 2014, BIOD-531 administered to non-diabetic, obese volunteers demonstrated ultra-rapid absorption and onset of action in comparison with Humalog Mix 75/25 and Humulin R U-500, ...

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!