Need help with a regulatory guidance? Look here first.

Drug development is a highly regulated industry. Regulatory agencies are charged with protecting public safety as their first priority, thus they develop guidance documents to ensure the public that future pharmaceutical agents are safe. As regulators learn from experiences with many candidate drug molecules, they develop guidance documents to help other pharmaceutical companies develop safe medications. These guidance documents are often very comprehensive and include recommendations and rationale for the scientific topic. These documents that used to be 5 to 10 pages have ballooned to over 70 pages in some instances. The increase in document length creates a challenge for those working in the pharmaceutical industry because a large amount of time needs to be invested in reading the documents. In addition, the larger documents can be confusing and too comprehensive for rapid implementation.

My objective has been to educate and teach the pharmacokinetics industry using simple explanations. To that end, I have prepared regulatory guidance summaries for select regulatory guidance documents in the clinical pharmacology area. You can find these summary document, available for purchase on my website under Services > Regulatory Guidance Summaries. I will continue to add new guidance summaries over the next few months. In addition, I will update the summaries as guidance documents are updated or revised.

Each guidance summary contains the following:

  • Executive summary (<1 page)
  • High-level overview of each section of the guidance
  • Bullet-point recommendations for each guidance recommendation
  • Clear description of what is required and what is not required
  • Total length of less than 10 pages

The guidance summaries are clearly written and concise. Each summary also includes the associated regulatory document for reference if further details are required. Purchases are handled securely by PayPal, and you will be able to download your document immediately. So, if you need to review a regulatory guidance, come get the guidance summary first and be an expert on the topic after a quick review of my summary.

You can download the regulatory guidance summaries here.

PK Curve released for Android

The only mobile app that can generate pharmacokinetic curves and calculate non-compartmental pharmacokinetic parameters has been released for the Android platform. The same app that was released for the iPhone is now available for your android device.

Click here to download PK Curve … free!

2011 in review

The WordPress.com stats helper monkeys prepared a 2011 annual report for this blog.

Here’s an excerpt:

The concert hall at the Syndey Opera House holds 2,700 people. This blog was viewed about 55,000 times in 2011. If it were a concert at Sydney Opera House, it would take about 20 sold-out performances for that many people to see it.

Click here to see the complete report.

New iPhone app released – PK Curve

I often find myself in a conversation about pharmacokinetics and come to a point where I need a sheet of paper or a whiteboard to draw a pharmacokinetic curve. After drawing a “base” curve, I then show how changes in some PK parameter will cause changes in the concentration-time profile. These discussions occur with pharmacokinetic scientists as well as with experts from other disciplines. At the end of the discussion, someone either takes a picture of the whiteboard or takes the sheet of paper away as a reminder of what was discussed.

One day while doing that, I noticed that my iPhone was sitting there during a conversation and I thought to myself, “Why can’t I do all this on my iPhone?” Now you can! I have developed an iOS app that accomplishes the same thing using your iPhone, iPod Touch, or iPad. Over the past several months I have been working with a software developer to create an iPhone app that is focused on the needs of the pharmacokinetic scientist. The result of this collaboration is the release of PK Curve, a new iPhone app that is available in the iTunes App store today. This is a free app that you can use on your iPhone, iPod Touch, or iPad.

The PK Curve app is your pharmacokinetic resource for your iPhone or iPod Touch! Select the route of administration, number of compartments, and input profile and PK Curve will calculate the Cmax, AUC and t1/2. Then PK Curve will draw the concentration-time profile using linear and logarithmic y-axes. Then you can save the PK Curve and email the settings, parameters, and both the linear and logarithmic graphs to yourself or a colleague. Great for students, industry scientists, consultants, and anyone interested in pharmacy or pharmaceutical sciences.

Use PK Curve to quickly demonstrate the effect of:
* changes in clearance due to a drug interaction
* changes in oral absorption with an extended release formulation
* changes in exposure with increased bioavailability
* changes in volume of distribution

PK Curve includes the following PK models:
* 1-compartment IV bolus administration
* 1-compartment IV infusion administration
* 1-compartment oral 1st order absorption
* 1-compartment oral zero-order absorption
* 2-compartment IV bolus administration
* 2-compartment IV infusion administration
* 2-compartment oral 1st order absorption
* 2-compartment oral zero-order absorption

PK Curve calculates the following parameters for each model:
* Cmax – Maximum plasma concentration
* t1/2 – apparent terminal half-life
* AUC – Area under the plasma concentration-time curve

Go ahead and download the new PK Curve App from the iTunes store. Post your comments, reviews, and feedback. Let me know what to add in the next version of this App. Read more at my website.

Sorry for the delay … life is happening.

I apologize for the delay in my software review of WinNonlin. My wife had a diagnostic medical procedure last week and is due for surgery later this week or next week. I appreciate your understanding while I tend to my family.

Thank you,

Nathan

Come hear me speak at the DIA 2011 Annual Meeting

The program for the 2011 Annual DIA meeting in Chicago was released today, and I will be speaking about PK considerations for ophthalmology studies. I will be a part of a panel discussion led by Dr. James Kissling of Covance Laboratories titled “The Eyes Have It! The Unique Advantages of Clinical Research in Ophthalmology Trials: PK/PD and Biomarkers in Ophthalmology”. This will be a wonderful opportunity to examine the exciting research in PK/PD related to ophthalmology. If you can attend, I’d love to see you in Chicago this summer. You can find out more at the DIA website. If you click on Agenda/Wednesday/3:30 – 5:00 pm, you can find the panel discussion titled above.

PK Software Review Results

Thank you to all who voted on the poll last week. The results are final, and it looks like NONMEM and WinNonlin are the most requested software packages for review. Look for blog posts with the reviews in the coming weeks.