85 – Process Validation & Regulatory Requirements (S6E10)

We dive into some pretty technical stuff sometimes.
And today is no exception. We're gonna take a
deep dive into process validation and the regulatory
requirements around that in pharmaceutical manufacturing.
Sounds complicated. Yeah, it is kind of. But
think about it this way. Making sure that the
medicines that you and I and our families depend
on are made right. Right, yeah. Consistently
and with high quality. Absolutely. That's something
we all care about right. Yeah. So that's what
we're gonna be looking at today. It's important
stuff. So that's our mission. To sort of unpack
what it means to validate how medicines are made
and then also how do these organizations come,
the regulatory bodies, ensure that these things
are actually being done correctly and that each
batch of medicine, is made to the same quality
standards. Yeah. I mean, it's easy to just take
it for granted. Totally. That when we go to the
pharmacy and we pick up a prescription, we just
assume that it's going to work exactly as intended.
Yeah. Every single time. Of course. But there's
a lot that goes into that. Oh, yeah. You know,
behind the scenes. It's a huge amount of work.
So much science and oversight. Right. Very meticulous.
Yeah. And so to get into this today, We've pulled
from a bunch of different sources, looking at
the way pharmaceuticals are developed and the
guidelines that are out there, and even some
real -world examples from research and stuff
like that, the OPRND stuff. Yeah, so we can really
see how it's done in practice, not just the theory.
Yeah, and one of the things that really stands
out from those sources is just how detailed and
careful this whole process is, because consistent
manufacturing is crucial. It's not just like
a nice to have. It's fundamental to drug safety
and how well a medicine actually works for people.
Yeah. If it's not made the same way every time,
then you can't really be sure if it's going to
work the same way every time. You don't want
unexpected consequences, do you? Nope. Definitely
not. You've got to know it's going to do what
it's supposed to do. Right. So let's get into
the nitty gritty here. What exactly is process
validation? I mean it seems obvious from the
words, but what does it actually look like in
practice? So when we talk about process validation
in this context, we're talking about proof. Okay.
Solid documented proof that the process you're
using to make a drug is going to consistently
produce a product that meets the standards that
have been set. Okay. The quality standards. So
it's not just about getting it right once or
twice in the lab. No, no, no. It's about showing
that every single batch that comes out of the
factory is going to be the same. Exactly. And
it's going to meet those quality standards every
time. You're building quality into the process
itself. Right. From the ground up. So you're
not just hoping for the best. No. You're making
sure that it's going to work. Right. It's about
having a system you can trust. Right. And that
it's going to work even if things change a little
bit. Yes. Even with the normal variations that
you might get in the manufacturing environment.
Like with raw materials or the environment itself.
OK. That makes a lot of sense. Good. So how do
you actually do process validation then? Right.
What are the steps to making sure that that consistency
is there? Well, it starts with defining the process
really carefully. OK. You need to understand
every single step, all the different parameters
that could affect the quality of the final product.
Like what kind of parameters are we talking about
here? Well, it could be things like the temperature
of a reaction, or the speed at which things are
mixed together, how long a particular process
takes. All those things can have an impact. So
it's kind of like a map of the entire journey
of the medicine? Yeah, that's a good way to think
about it, from the very beginning to the final
product. And once you have that map, what happens
next? So once you've got that process mapped
out, you need to create validation protocols.
These are written procedures. that describe exactly
how you're gonna carry out the validation process.
Okay, so it's like an instruction manual for
proving that your manufacturing process actually
works. Yeah, you're basically laying out your
argument. Right. That the process will consistently
produce a good product. Okay. And then you're
explaining exactly how you're going to prove
it. Right. And I imagine you have to follow those
protocols very carefully. Absolutely. It's crucial.
Yeah. And then documentation is key. This is
really important. So we're talking about keeping
records of everything. Everything. OK. Every
single step, every test, every result. Wow. Any
deviations from the protocol. All of that has
to be recorded in detail. So it's like a paper
trail. It is a paper trail. OK. and it's essential
because it serves as evidence that the process
has been properly validated. So if it's not written
down, like it never happened? Pretty much, yeah.
Okay, so documentation is vital. Vital. And what
about the equipment itself? Right. So that's
where performance qualification comes in. OK.
This is where you make sure that the equipment
and the whole process are actually working as
they should under real world conditions. So you're
basically running the process at full scale.
Yeah. Using the real materials. Using the actual
materials and everything to confirm that it produces
the right product. So to recap, we've got defining
the process, creating the protocols. Yes. documenting
everything. Absolutely. And then testing it all
under real world conditions. Yeah, you got it.
Wow, it's a lot. It is a thorough process. But
it seems very thorough and systematic. It has
to be. Right, because we're talking about people's
health here. Exactly. So let's talk about the
regulatory bodies. OK. We touched on them earlier.
Yeah. So the manufacturers do all this work,
but who's making sure that they're doing it right?
Right. Who's making sure they're following the
standards? Yeah, that's where the regulatory
agencies come in. OK. They oversee the whole
pharmaceutical industry, making sure that manufacturers
are producing safe and effective medicines. They
can inspect facilities, review documentation,
and enforce the regulations. So they're like
independent auditors? Yeah, you could say that.
They come in and check that everyone's doing
things properly. Got it. Our sources also talk
about some of the legal frameworks involved here.
OK. For example, in the US, there's the Federal
Food, Drug, and Cosmetic Act. Oh, huh. And it
defines what a device is. OK. And that definition
is really broad. So it includes the equipment
used in manufacturing. Yeah. It includes lots
of instruments and apparatus used in medicine.
OK. So even though it doesn't specifically talk
about pharmacies, pharmaceutical manufacturing
processes, it shows you how regulated this environment
is. Because all those devices are being used
in manufacturing. Exactly. It all ties together.
So it's not just about the medicine itself. No.
It's about everything that goes into making it.
The equipment, the processes, all of it. And
how has the way we regulate the stuff changed
over time? Well, one of our sources mentions
this document called Pharmaceutical Current Good
Manufacturing Practices, CGMPs, for the 21st
century, a risk -based approach. OK, that's a
mouthful. It is. That's what I'm about. It talks
about a shift towards a more flexible approach
to regulation, especially when it comes to changes
that manufacturers want to make after a drug
has already been approved. So instead of having
a fixed set of rules for every change, they're
looking at the risks involved. Exactly. They're
taking a more nuanced approach. Yeah, that makes
sense. Yeah. And this is also discussed in the
context of ICHQ12, which is an international
guideline for managing the life cycle of pharmaceutical
products. It's all about encouraging improvement
and innovation. Without compromising on quality.
Exactly. You want to be able to adapt and improve.
Right. but you can't ever sacrifice quality.
So it's finding that balance. OK, so let's go
back to those validation protocols for a minute.
I talked about them earlier. Yeah. But can you
remind us why they're so important and what kind
of detail they need to have? So these protocols
are like the foundation of the whole validation
process. OK. They're detailed plans that cover
every aspect of the validation. Give me an example.
Well, they'll include things like the objectives.
OK. What are you trying to? achieve with this
validation, then the procedures, the step -by
-step instructions for how to carry out the validation,
the acceptance criteria, these are the specific
results you need to get to show that the process
is validated, and finally, the responsibilities.
Who's in charge of each part of the process?
So it's not just a general overview? No, no,
no. It's super specific. Very specific, and it
all links back to the importance of documentation.
The protocol tells you exactly what records to
keep. And those records become the proof that
everything was done correctly. And those records
have to meet certain standards, too, right? Absolutely.
There are regulatory guidelines that specify
how those records need to be kept. Right. And
for how long. So it's a very closed loop system.
It is. OK, so the protocol says what to do. And
the documentation proves that it was done. Right.
And that the results were what you expected.
Exactly. That makes sense. Good. Now, I'm really
interested in seeing how this works in the real
world. Me too. You know, when you're actually
scaling up production from the lab to the factory.
Right, because it's one thing to talk about the
theory, but it's another thing to see how it's
applied in practice. Exactly. And luckily, our
sources have some great examples of this. They
do. Especially from those OPRND papers. So what
kind of things did you find? Well, one interesting
example was about developing a process for making
a key intermediate compound that was used in
a particular drug. And the researchers were really
focused on getting a high yield of this intermediate.
So they wanted to make as much of it as possible.
Exactly. But they also wanted to avoid using
expensive starting materials or complicated purification
methods. Because those things can be difficult
to scale up. Yeah, they can be really tricky
and expensive to do on a large scale. So what
do they do? They optimize the process to use
techniques that were easier to scale, like distillation
or recrystallization instead of things like chromatography,
which can be harder to scale. So they were thinking
about the practicalities of scaling up. Right
from the start. Right from the beginning. Yeah,
they knew that if a process couldn't be easily
scaled up, it wouldn't be practical for large
-scale drug production. Makes sense. Another
interesting case study was about a continuous
flow process for synthesizing a different intermediate
compound. And in this case, they did a really
detailed kinetic study. OK, so that's looking
at the speed of the reaction. Yeah, and what
factors affect it. Uh -huh. And they use that
information to develop a really robust and scalable
process. Okay. And they paid a lot of attention
to controlling the different parameters to make
sure that they got a consistent output. Even
as they increase the production volume. Exactly.
Understanding that kinetics is key. It's essential
for maintaining control. When you're working
with larger quantities. Absolutely. What else
did you find? Well, there was another example
where they were trying to optimize a process
Okay to increase the yield of a particular drug
and also to eliminate certain byproducts So making
the reaction cleaner exactly and this made the
whole process simpler Especially the purification
steps because fewer impurities meant less work
to purify the product exact And that's really
important when you're scaling up. It is. Because
the more steps you have, the more chances there
are for things to go wrong. Exactly. And you
want to keep it as simple and consistent as possible.
There was also one example that was a bit different.
It talked about a collaboration between IT companies
and pharma companies. Interesting. Yeah. They
were developing AI tools for health care. Wow.
Yeah. So it wasn't directly about process validation,
but it shows how technology can play a role in
this area. Yeah. In analyzing all that data that
gets generated during manufacturing. Exactly.
And that can help to ensure consistency. by identifying
trends and potential problems. Yeah, it's really
fascinating how AI is being applied in this field.
It really is. So these are just a few examples,
but they show the kind of scientific rigor that's
involved in scaling up these processes. Yeah,
it's not just about following a recipe. No. You
need to understand the chemistry and the engineering.
Absolutely. And I imagine there are some challenges
involved in scaling up. Oh, definitely. Like,
what kind of things? Well, one common challenge
is variability in raw materials. OK. strict quality
control, there can still be differences between
batches of starting materials. And that can affect
the process? It can. Okay, what else? The performance
of the equipment can also be an issue. Something
that works perfectly at a small scale might not
work the same way at a larger scale. Okay, so
you might need to re -engineer things. Sometimes,
yeah. And then, of course, you need to make sure
that the process parameters are still effective,
even when you're working with much larger quantities.
So you need to be constantly monitoring and adjusting
things to maintain that consistency. Absolutely.
This has been a really fascinating deep dive.
It has. We've covered so much. We have. From
what process validation is to how it's regulated
and even some real world examples. Right. And
I think the key takeaway for our listeners is
that This is really important stuff. Absolutely.
Process validation is crucial for making sure
that our medicines are safe and effective. And
it's not just a box to check. It's a complex
process with lots of steps and lots of oversight.
And it requires a deep understanding of the science
involved and those real world examples we talked
about. They really highlight that. They do. So
as a final thought, given everything we've learned
today. What questions do you have about the journey
your medications take from the lab to your medicine
cabinet? Yeah, it's amazing to think about all
the work that goes into it. It is, and it's all
about ensuring the quality and consistency of
the products you rely on. So the next time you
pick up a prescription, take a moment to appreciate
the complex process that made it possible. And
all the people who work hard to ensure its safety
and effectiveness. Absolutely. It's a testament
to science and human ingenuity. It really is.
And it's something we should all be grateful
for. I agree. So until next time, stay curious.
And stay informed. See you later. Bye.