Researchers Discover Breakthrough Drug Delivery Method By Changing Shape of Pill 66
ErnieKey writes: Researchers at the UCL School of Pharmacy, University College London have found a way to change the rate of dissolution within medication via a 3D printing method. Researchers used MakerBot's water- soluble filament, cut it into tiny pieces and mixed in acetaminophen. They then used the Filabot extruder to extrude a drug infused filament. With this filament they printed odd shaped pills and tested them to see what effect different shapes had on the speed at which they dissolved. What they concluded was that these odd shaped pills allowed for different rates of absorption, enabling custom medications for patients.
Surface area to volume (Score:5, Insightful)
Surface area to volume ratio found to affect rate of dissolution, details at 11.
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Indeed, other than the words '3D printing', why is this news? It's not exactly rocket science.
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Yes people hype 3D printing to death but 3D printing is still a useful tooll.
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You make a pill and it takes t amount of time to dissolve for 95% of the population. But for some people it would dissolve much quicker and others much longer.
Of course I didn't read the f'ing article but being able to further fine tune the delivery of medi
Re:Surface area to volume (Score:5, Funny)
But it's with a 3-D printer! That makes it novel and non-obvious, right? The patent system couldn't be wrong...
Re:Surface area to volume (Score:5, Funny)
But it's with a 3-D printer! That makes it novel and non-obvious, right?
Wait until I incorporate a drone in the 3D printing process .. that'll really shake up the drug delivery industry!
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No need; systemd will incorporate this functionality within a year.
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But it's with a 3-D printer! That makes it novel and non-obvious, right?
Wait until I incorporate a drone in the 3D printing process .. that'll really shake up the drug delivery industry!
Prior art autonamous replicating drones [memory-alpha.org] on Star Trek TNG season 1 "arsenal of freedom" and it didn't turn out well for the people that made them either.
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Surface area to volume ratio found to affect rate of dissolution, details at 11.
I read the article hoping it was beyond High School basics. But nope, I wouldn't want my name on it.
Wonder who paid for this "research", as it would of been cheaper to of just read Wikipedia http://en.wikipedia.org/wiki/S... [wikipedia.org]
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Exactly, I am afraid that if "researchers" that should know this basic property are just now discovering it.... IT means the value of an advanced degree is complete and utter rubbish.
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This still seems like it could be due to some straightforward geometry. Take the sphere for instance, SA/V ratio (3/r) will change as the pill dissolves (the radius r will decrease with time). If dissolution rate is a function of SA/V then that will slow down over time. They don't fit any equations to the data, but the smooth curves for % drug release over
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Surface area to volume ratio found to affect rate of dissolution, details at 11.
Unfortunately it's not nearly that simple. If pills were simply dropped into a static solution and allowed to dissolve, you'd be right. The problem is that mechanical mixing occurs in the stomach, something which varies a lot from individual to individual.
Pharmaceutical companies work very hard to try to make generic pill formats that ensure consistent delivery. They test the dissolution rates [wikipedia.org] in stirred beakers and try to correlate those results to delivery rates in animal models and human testing. Even if
Pharmacist here (Score:3, Informative)
Shape and rate of dissolution are already well known, and heavily used.
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The patient personalization part? Though could argue that back in the day of hand crafted medicine it already was and that this is just 'with a 3d printer'....
So which dissolves faster? (Score:5, Funny)
Fred or Dino?
fast-acting and slow release combined? (Score:1)
This raises the question of why nobody currently offers a slow-release alalgesic coated with a layer of fast-acting analgesic. Seems like that would be just the thing for immediate relief without having to keep popping pills.
Re:fast-acting and slow release combined? (Score:5, Informative)
That's how most of the '-contin' formulations work (eg oxycontin). You make tiny pellets of the analgesic, add a thin layer of wax to some, a thicker layer to some, a thicker yet layer to some, then make up a pill containing some pellets with no coating, and some with each of the increasingly thicker layers of wax. When you swallow the pill, the stuff with no layer goes into immediate effect (so you get fast acting relief). The acid in your stomach starts dissolving the wax around the rest, with the different thicknesses of wax acting to give a continuous release of the remaining analgesic. Different formulations have differing amounts of the initial uncoated analgesic.
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And we've been doing it since at least the 1940s with everything from pharmaceuticals to fertilizer and hence it's extremely well developed and cheap technology.
Alanis Morissette (Score:3, Funny)
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Ironically, it is a Jagged Little Pill.
Slow. Clap.
Re: Alanis Morissette (Score:3, Funny)
What?! (Score:3)
Didn't actually RTFA, though, so my sarcasm may be unwarranted. You have been warned! :-)
Re:What?! (Score:5, Informative)
They kept the surface area constant between the shapes.
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They kept the surface area constant between the shapes.
Doesn't matter since the relative surface areas will change as it dissolves.
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Your sarcasm was fully warranted.
They "discovered" that the dissolution rate is essentially equal to surface area over volume.
For their next experiment they will 3D print it as a loose powder and see if that has any effect.
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A little hard to swallow.. (Score:2)
Congratulate the efforts, but success to be proven (Score:5, Informative)
The study is an attempt to find correlation between the surface area and dissolution rate.... Every year there are are trillions of pills manufactured pharmaceutical companies and there are many parameters that are being tested, all branch of one of the pharmacology and it is called pharmaceutics, http://en.wikipedia.org/wiki/P... [wikipedia.org] . You can bet that in pharmaceutical manufacturing is super efficient and yes, for the manufacturing of this kind of scale, there is always a demand for improvement and innovations. Happy to encourage scientific research in academia, but announcing 3D printed pills a breakthrough is a bit of exaggeration, but that is not to say that there is no practical application to it.
Custom 3D sculpturing is a blast from 17th and 18th century, when pharmacists ground and mixed medications and it was a manual process. Article is clear that 3D printing may allow to customize absorption rate... This needs to be approved by FDA, at least in USA, before the regular patient can acquire it.
That being said, this will be just one of many medication delivery methods competing with already established methods and curious reader can, again, get a glimpse to the methods here: http://en.wikipedia.org/wiki/T... [wikipedia.org]
Futurama (Score:5, Funny)
- I can't swallow that!
- Well then good news! It's a suppository!
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"Did everyone take their anti-pressure pils?"
"YES! Stop Asking!"
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So you get hard when you swallow cocks?
raises hand (Score:2)
Is the Maker Bot water-soluble filament safe to digest? I'd google it to find out, but I prefer the human contact of a question answered.
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Is the Maker Bot water-soluble filament safe to digest? I'd google it to find out, but I prefer the human contact of a question answered.
I had the same question and I don't mind googling: It appears water-soluble filament is poly vinyl alcohol, which is reasonably safe [nih.gov] to ingest in small amounts. From the linked abstract: " A critical evaluation of the existing information on PVA supports its safety for use as a coating agent for pharmaceutical and dietary supplement products."
Stupid idea (Score:2)
patents on shapes (Score:1)
Apple got a patent on making their product a certain shape (rounded corners).
Big pharma didn't want to miss out on the action, but they sure took their time to catch up.
Magically delicious (Score:2)
Did they try all the shapes from Lucky Charms? I want to know which marshmallow is going to give me the best delivery of time-release aspirin.
University College London (Score:1)
So they probably used paracetemol.
Potential for abuse? (Score:2)
Which shape will get me highest the fastest? That's what I expect will be the most common question asked.
I see many possible problems with this, getting it FDA approved is just one of them. What will prevent someone from printing a hollow pill and stealing what what supposed to go in the middle to sell on the black market? The pills could be weighed but the pills could be filled with something of equal mass like sugar, sand, or something not so inert.
Will these pills be printed at the pharmacy? I seem t