Pharmacology Spotlight: Antihypertensive Medications 🩺

 As you dive into the fascinating world of pharmacology, let’s take a moment to break down one of the most important drug classes you’ll encounter: antihypertensives. 💊 These medications are crucial for managing high blood pressure (hypertension), a major risk factor for cardiovascular disease. 

Here’s a detailed overview to help you connect the mechanisms of these drugs to physiology:

💊 Neurotransmitters on drugs: How alcohol, medications & other substances affect the CNS

Every action in the brain - whether catching a ball, calming a panic attack, or waking from anaesthesia - starts at the synapse. In physiology, you’ve already met the major neurotransmitters: GABA, glutamate, dopamine, serotonin, acetylcholine, and noradrenaline.

Now it’s time to see these in clinical action. If you haven't already read it, go back and check out the Neurotransmitters 101 post, it will help it all make sense. 

Many drugs and substances - from prescription medications to recreational drugs - alter the brain’s electrochemical balance. They dial neurotransmitter signalling up or down, leading to effects that are therapeutic, recreational, harmful, or all three. Understanding how they work builds your clinical intuition - and helps you spot mechanisms behind both therapeutic effects and side effects.

 We’ll explore how each class works, what effects they trigger, and where they act in the neural circuit. Consider this your pharmacological map of the CNS - designed for clarity, clinical context, and curiosity.

🦠 Common Renal Infections: Pathophysiology Meets Practice

 Infections in the renal system are among the most common reasons patients present to GPs and emergency departments — yet their underlying mechanisms are often oversimplified. These aren't just “bladder bugs” causing discomfort: they are dynamic, evolving conditions that reflect an interplay between microbial virulence, host defence, and anatomical vulnerabilities.

From the relatively straightforward presentation of cystitis to the more serious implications of pyelonephritis, renal infections provide a perfect lens through which to explore the clinical relevance of physiology and pathophysiology. How does a bacterium from the gut end up damaging a kidney? What determines whether a simple UTI becomes a systemic illness? And how do we decide when antibiotics, imaging, or hospital admission are truly necessary?

In this post, we’ll explore how renal infections arise, what differentiates upper from lower tract involvement, and how pathophysiological principles guide investigation and treatment decisions.

Upper GI pharmacology - important classes of drugs to know

 Acid suppression therapy

Acid suppression therapy plays a central role in the management of a range of upper gastrointestinal conditions, including gastro-oesophageal reflux disease (GORD), peptic ulcer disease, and dyspepsia. By reducing gastric acid secretion, these therapies help relieve symptoms, promote mucosal healing, and prevent complications such as bleeding or strictures. 

With the widespread use of proton pump inhibitors (PPIs) and H2-receptor antagonists, it’s important for medical students and clinicians alike to understand their mechanisms, appropriate indications, and potential risks—especially given rising concerns about long-term use.

NSAIDs & Your Stomach: What Every Med Student Should Know

Nonsteroidal anti-inflammatory drugs (NSAIDs)—such as ibuprofen, naproxen, and aspirin—are essential in clinical practice, but their effects on the gastric mucosa are often underestimated. A common belief is that taking NSAIDs with food reduces stomach irritation. But is this actually true? 

We have discussed this earlier in the week, so thought I would provide a bit more explanation ... featuring my favourite biochemical pathway!!! IYKYK 😁

Pharmacology Focus: Asthma Medications – Part 2

 Preventers & Add-On Therapies

In Part 1, we explored bronchodilators – which treat bronchoconstriction, one part of the asthma puzzle. But asthma is fundamentally a chronic inflammatory disease, and ongoing airway inflammation needs long-term control to prevent symptoms, reduce exacerbations, and preserve lung function.

This is where preventers and add-on anti-inflammatory therapies come in.

What is the link between aspirin and asthma?

I made this video 8 years or so ago about the role of aspirin sensitivity in asthma - the pharmacology is very cool- you might find it interesting? (it contains my favourite biochemical pathway ! )

Pharmacology Focus: Asthma Medications – Part 1

Bronchodilator therapies in Asthma

Asthma management isn't just about relieving symptoms — it's about understanding the underlying pathophysiology and targeting different mechanisms. Bronchodilators play a key role in managing airway narrowing, a hallmark of asthma, but they don't all work the same way.

Let’s look at the major bronchodilator classes used in asthma: short-acting β2 agonists (SABAs), long-acting β2 agonists (LABAs), and muscarinic antagonists (SAMAs and LAMAs) — and link them to the science behind the symptoms.