100 – Case Study: Formulation to Market Success (S7E10)

Okay, so we always hear about these like amazing
new drugs, right? You know, the ones hitting
the market and it's this big scientific thing,
right? You discover a molecule and it can like...
target a disease, but did you ever stop and think
about what happens after they discover it? How
does it actually get into a form where our bodies
can actually use it? Yeah, that's the real magic,
isn't it? Yeah, it's a huge story. It's full
of problem solving and breakthroughs, and that's
what we're looking at today. That's a drug formulation.
That's right. It's kind of like you have this
really brilliant blueprint for a building, right?
Yeah. But you still need to figure out the best
materials and how you're gonna actually build
the thing to make that vision a reality. That's
a good analogy. Yeah, and that's where formulation
comes in in drug development. It's like the engineering
and construction side of things. So for this
deep dive, we've got some really interesting
stuff to go through. We've got like, you know,
journal articles from OPR and D and all sorts
of perspectives from pharmacology and drug development.
Yeah. And we're going to try to use like a case
study approach, you know, to explore how all
these formulation strategies, you know, they
get used to solve all these really difficult
challenges to get the drug, you know, to patients
who need it. Absolutely. Without like, you know,
blinding you with science. Right. Exactly. We
want to give you that behind the scenes. look
at how these decisions are made. But we don't
want to get too bogged down in the technical
jargon. Why have some fun with this? So let's
set the stage for our case study. Imagine a new
drug, and it looks really promising. Like, it
could really be effective at treating something
like a serious autoimmune disorder. But then
right at the beginning, researchers run into
a problem. The molecule, like, it doesn't dissolve
in water. Oh, wow. So if you just give it as
like a regular tablet, hardly any of it's going
to get absorbed into the bloodstream. So where
do you go from there? Well, this is where formulation
really comes in. As we said earlier, poor solubility
is a really common problem. If the drug can't
dissolve, it can't get to where it needs to be
to actually work. Of course. So in this example,
our scientists would have to get creative and
find some work grounds. Yeah. One thing they
might try is something called nanoparticle formulations.
Nanoparticles. Yeah. So are we talking about
like, you know, shrinking the drug particle down
to like teeny tiny size? That's exactly it. Okay,
so what's the benefit of that? Well, it's not
just about making it smaller by taking the particle
size down to the nanometer scale. You actually
massively increase the overall surface area of
the drug. Imagine you have a bag of like, you
know, big marbles. Okay. Now imagine the same
volume, but filled with fine sand. OK, yeah.
The fan has way more surface area. Yeah, definitely.
And this extra surface area lets it interact
with fluids a lot better. OK. Which means it
dissolves more effectively, and that leads to
better bioavailability. So it's like it can get
into the body and be used more easily. Exactly.
And get this, sometimes these nanoparticles can
be designed to actually target specific pathways
in the body. Wow. So you can deliver them right
where they're needed most. So it's not just about
dissolving better, it's like being more precise
about where it goes. Precisely. That's really
interesting. What other strategies are there
for dealing with a drug that just won't dissolve?
So another neat trick is something called self
-nano -emulsifying drug delivery systems. That's
a mouthful. Yeah, the acronym is S -N -E -D -E
-S. S -E -D -E -S. Much easier. Yeah. Think of
it like a tiny premixed salad dressing for the
drug. These are basically special blends of oils
and surfactants, things that help oil and water
mix, and co -solvents, which can actually dissolve
the drug. When these SNEDDS hit the fluids in
your digestive system, they immediately form
these super fine emulsions like oil and water.
It can seriously boost drug dissolution and absorption.
It can even help the drug get across cell membranes.
Oh, wow. So the formulation is almost like a
vehicle that gets the drug where it needs to
go. Exactly. That's really cool. Yeah. And then
you've got modified release formulations. OK.
So instead of just trying to make the drug dissolve
faster, the goal here is to control when and
how the drug is released over time. Oh, OK. This
could be super important for our autoimmune drug
example because you want to keep a steady level
of medication in the system. Right, to manage
the symptoms. Exactly. So how do you actually
achieve this controlled release? Well, there
are a bunch of clever ways to do it. One is to
embed the drug in a matrix system, which is usually
made up of polymers. OK. These matrices are designed
to slowly break down in the gut. releasing the
drug gradually over time. Okay. Some of them
actually swell up when they absorb fluids and
create this gel -like barrier that the drug has
to slowly diffuse through. Wow. You can also
use coatings on tablets or capsules. Right. These
coatings can be designed to only dissolve at
a specific pH level in the digestive tract. So
the drug is released exactly where you want it.
Oh, that's cool. Or they can just dissolve really
slowly over time. And then there are even more
sophisticated things like osmotic pumps. What
are those? They use osmotic pressure to deliver
a very precise amount of drug through a tiny
hole in the tablet's coating. So it's like engineering,
but on a microscopic level. It really is. It's
amazing. Yeah. In the stuff we were reading,
we also saw that controlling the... particle
size of the, you know, active ingredient, the
API. Yeah. And even the inactive ingredients,
the excipients is really important. Absolutely.
So for people who might not know, what are excipients
exactly? Excipients are all the other stuff in
the drug formulation that isn't the active ingredient.
OK. They do things like help with stability and
delivery, and they can even affect like the shape
and function of the dosage form. OK. So they're
kind of like the support crew. Exactly. OK, cool.
So let's say our hypothetical drug, we've got
it. dissolving properly now, thanks to some smart
formulation. But then it turns out that the drug
itself, like actual drug substance, isn't very
stable. Like maybe it breaks down over time or
when it's exposed to heat or light or whatever.
Yeah, that's another common problem. So how do
formulators deal with that? Well, in this case,
it's all about protecting the drug. Things like
oxidation hydrolysis, that's when it reacts with
water. OK. And light exposure can all cause a
drug to break down, loses potency, and maybe
even form harmful byproducts. So it's about keeping
it safe. Exactly. And there are a few ways to
do that. You can add antioxidants, like tocophorols.
Tocophorols. Yeah, they're generally considered
safe and they can help prevent oxidation. put
desiccants in the packaging to absorb moisture,
so it doesn't react with water. Right. And you
can use special packaging to protect it from
light and air, like amber colored glass or blister
packs with protective layers. Oh, OK. So it's
about creating a stable little environment for
the drug. Exactly, like building a little fortress
around it. I like that. I also remember reading
about something called lyophilization. What's
that all about? Liophilization or freeze drying
is really important for certain types of drugs,
particularly biologics like proteins and antibodies.
Okay. These tend to be way more unstable in liquid
form. Right. So what you do is you freeze the
drink solution and then remove all the water
using a vacuum. Okay. What you're left with is
a dry powder that's a lot more stable and you
could just reconstitute it with the solvent before
you give it to the patient. Oh, that's clever.
Okay, so our autoimmune drug It's soluble. It's
stable. Thanks to all this formulation work.
It's looking good. Yeah Well, what's the next
big hurdle to clear before it can become a medicine
that people can actually use? Well now we have
to navigate the regulatory landscape Oh, right
the FDA exactly before we can even test this
drug in large -scale clinical trials the people
developing it the company or institution, they
have to submit what's called an IND application.
IND? Yeah, it stands for Investigational New
Drug. And they send this to the regulatory agency
like the FDA here in the US. OK, so what exactly
needs to go into this IND application? It's pretty
comprehensive. It needs to tell the whole story
of the drug as it stands at that point in development.
OK. You need details about the chemistry and
manufacturing controls, basically how the drug
substance is made, how the final formulation
is produced, and how the quality is controlled.
So like the whole recipe and process? Pretty
much. You also need tons of pre -clinical data,
like how the drug works in the body. That's called
pharmacology. Okay. And toxicology, you know,
its safety profile based on animal studies. Right.
Plus any previous experience with humans, if
there is any, and a super detailed protocol for
the proposed clinical trial. Wow. So they want
to see everything. They do. The FDA wants to
make sure that it's reasonably safe to start
testing this drug in humans and that the studies
are scientifically sound. So the FDA is like
a gatekeeper, making sure only the promising
and safe drugs move on to trials. That's a good
way to put it. What happens after they submit
the IND? So the FDA reviews it all. and checks
if the initial dose they want to use in humans
is safe. For later stage trials, they also look
at how well the study is designed and if it's
likely to produce useful data on the drug's effectiveness.
OK. Usually there's a 30 -day review period after
the FDA gets the IND before the trial can start.
Unless they issue something called a clinical
hold. A clinical hold, what's that? It means
the FDA has some serious concerns about the safety
of the trial or the data they've been given.
Maybe they're worried about something they saw
in the toxicology studies or maybe there are
problems with the post -manufacturing controls.
Whatever it is, the study can't go ahead until
those concerns are addressed. So even if you've
got this amazing formulation, you can still hit
these regulatory roadblocks. Yeah, that's the
reality of drug development. OK, so let's say
our autoimmune drug, it sails through the IND
process, shows great results in the trials. You
know, it works. It's safe. Fantastic. What's
the next big challenge? Now comes the scaling
up of manufacturing. Oh, right. So taking it
from the lab to the factory. Exactly. And this
is a whole new ballgame. Yeah, I bet. Things
that work perfectly fine in small batches in
the lab might behave completely differently when
you try to make huge quantities. Right. I can
imagine. Yeah, things like mixing times, temperature
control, the ore you add ingredients in, all
of that becomes super critical when you're working
at a large scale. Yeah. And this is where good
manufacturing practices or GMP comes in. GMP.
This isn't just about paperwork. It's about making
sure every single dose that a patient gets is
the same high quality. OK. It covers everything
from how the manufacturing facilities are designed
and maintained to the training of personnel and
keeping records of every single step. So it's
all about consistency. Absolutely. And it's not
just about efficiency either. It's also about
making sure there's enough medication to go around.
That's a good point. What about the actual production
of the API, the active ingredient? Does the formulation
strategy affect that? Oh, absolutely. Process
chemistry, which is all about finding the best
ways to make the API. It's super connected to
formulation. The way they first make the drug
in the lab might not be practical for large scale
production because of cost or efficiency or maybe
environmental reasons. So process chemists work
on developing better ways to make the API in
the quantities they need. for the formulated
drug. So it's like a chain reaction. Each step
affects the next. Exactly. OK, so we've talked
about all these challenges and how scientists
overcome them. Yeah. But what does it all mean
for the average person? Why does all this careful
formulation work really matter? At the end of
the day, successful formulation is what gives
patients access to these treatments. OK. A drug
that's well formulated, it's stable, it's absorbed
easily, it's easy to take, that's way more likely
to be commercially viable, which means it can
reach more patients. Right. And even more importantly,
a good formulation can actually help patients
stick to their medication regimen. Oh, that's
a good point. Yeah. And that, of course, leads
to better outcomes for them. So for you listening,
just understanding all these formulation challenges,
it helps you see why some medicines are more
effective or easier to take than others. Exactly.
And it can even give you give a second chance
to drugs that might have failed before. Really?
How so? But you might have a drug that showed
amazing potential in the beginning, but it couldn't
be delivered properly or wasn't stable enough.
Yeah. But clever formulation can actually overcome
those problems and bring that drug back to life.
So it's not just about tweaking things. It can
be a real game changer. Absolutely. So as we
wrap up our... deep dive into the world of pharmaceutical
formulation. What's the big takeaway? The big
thing to remember is that innovative formulation,
it's not just a side detail. It's a critical
part of drug development. It's the bridge between
a cool scientific discovery and a medicine that
can actually help people. It's the difference
between an idea and a treatment. Exactly. Is
there a particular example from our case study
or the research we did that really shows this?
Well, think back to our autoimmune drug, the
one that had solubility problems. If the scientists
managed to develop a nanoparticle version of
it, it could mean patients could take a way lower
dose and get the same benefit, which of course
could mean fewer side effects. Or if they made
a controlled release version, it might mean patients
only have to take the medication once a day instead
of multiple times a day. That would be huge.
Right. It could really improve their quality
of life and make them more likely to stick to
the treatment plan. Yeah, that makes a lot of
sense. So all these seemingly technical choices,
they have a real impact on people's lives. Absolutely.
It really makes you appreciate all the thought
and work that goes into developing these medicines
to make sure they work effectively and safely.
Exactly. Now that you know all about these formulation
challenges, I wonder what you'll think about
differently next time you take a medication.
The size of the pill, whether you have to take
it with food, how often you take it, all of that
stuff. It's fascinating. It is. And just imagine
how things like nanotechnology and other advancements
could totally change how we formulate and deliver
drugs in the future. It's mind blowing to think
about. It really is. There's so many possibilities
for treating diseases in ways we haven't even
thought of yet. It's an exciting field. It really
is. Well, thanks for joining us on this deep
dive into the world of pharmaceutical formulation.
It's been a pleasure. I hope you learn something
new and maybe even see your medications in a
whole new light. Me too. Until next time, stay
curious and stay informed. See ya.