Chris Armstrong is a GPhC-registered pharmacist with over 40 years of experience in community pharmacy. Having founded and operated his own pharmacy business for four decades, Chris brings an unrivalled depth of knowledge in dispensing practice, pharmacy operations, and patient-centred service delivery. His career on the front line of community pharmacy makes him a trusted voice on medication management, regulatory compliance, and the practical realities of healthcare access.
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Articles by Chris Armstrong
Does Creatine Increase Libido or Help With Erectile Dysfunction?
Creatine is one of the most popular supplements in the gym. But does it actually help with erections or libido? Here's what the evidence actually shows.
Cycling, Anxiety and Antibiotics: Three Surprising Causes of Erectile Dysfunction
Can cycling, stress, or a course of antibiotics really affect your erections? A UK pharmacist explains what the evidence actually says.
Does Collagen Help With Weight Loss? What the Evidence Actually Shows
Collagen is one of the UK's best-selling supplements, but does it actually help you lose weight? Here's an honest look at the science.
Does Amitriptyline Cause Hair Loss? Medications, Deficiencies, and Scalp Conditions Explained
Worried about hair loss while taking amitriptyline? This UK guide covers medication-related shedding, vitamin deficiencies, and scalp conditions that affect hair.
Is Rice Good for Weight Loss?
Rice doesn't have to be off the menu when you're losing weight. Here's what the evidence says about portions, varieties, and how rice fits a calorie deficit.
Does Tadalafil Increase Testosterone? And What About Zinc and Ashwagandha?
Tadalafil won't raise your testosterone. But zinc and ashwagandha might help in certain situations. Here's what the evidence actually shows.
Does Sertraline Cause Weight Gain?
Sertraline can affect your weight, but the picture is more nuanced than a simple yes or no. Here's what the evidence actually shows.
Dutasteride vs Finasteride for Hair Loss: Which Works Better?
Both block DHT to slow male pattern baldness, but they work differently. Here's how dutasteride and finasteride compare on effectiveness, side effects, and cost.
Your first month on Mounjaro or Wegovy: what actually happens
A pharmacist's guide to your first 30 days on Mounjaro or Wegovy: appetite changes, side effects, weight loss timelines and what's normal.
Does Minoxidil Work for Women? What the Evidence Says
Minoxidil isn't just for men. Here's what the clinical evidence actually shows about topical and oral minoxidil for female hair loss in the UK.
Does Weed Cause Erectile Dysfunction? Cannabis, Porn, and Antibiotics Explained
Cannabis, porn, and antibiotics are all linked to ED questions online. Here's what the evidence actually says about each one.
Does Amlodipine Cause Erectile Dysfunction?
Amlodipine lists ED as an uncommon side effect, but the picture is more complex. Here's what the evidence actually says, and what you can do about it.
Does B12 Deficiency Cause Hair Loss? What the Evidence Says
B12 and iron deficiency can both contribute to hair shedding. Here's what the evidence shows, how to get tested on the NHS, and when it's reversible.
Is Salmon Good For Weight Loss?
Salmon is one of the most nutritious foods you can eat, but does it actually help with weight loss? Here's what the evidence says.
Does Smoking Increase Testosterone? The Science Behind Nicotine and Hormone Health
Smokers sometimes show higher testosterone readings, but the full picture is more complicated. Here's what the research actually says about nicotine and your hormones.
Finasteride side effects: what the evidence actually shows
Worried about finasteride side effects? A UK pharmacist breaks down what's common, what's rare, and what the research really says.
Does testosterone make you stronger?
Testosterone does help build muscle, but it's not the whole story. Here's how T affects strength, what TRT can realistically do, and when low levels might be the problem.
Does Weight Loss Medication Interfere With Birth Control?
Taking GLP-1 medications like Wegovy or Mounjaro? Here's what UK women should know about how they may affect hormonal contraception.
Mounjaro meal plan: what to eat for a 7-day week
A practical 7-day Mounjaro meal plan with UK meal ideas, side effect tips, and budget-friendly shopping advice from a pharmacist's perspective.
Does Mounjaro Affect Fertility and Your Menstrual Cycle?
Mounjaro doesn't directly disrupt fertility or periods, but the weight loss it causes can shift your hormones significantly. Here's what to expect.
Side Effects of TRT: A Pharmacist's Honest Guide
From acne to fertility changes, here's what TRT actually does to your body - and what's manageable with proper monitoring.
Finasteride and Minoxidil Together: Does the Combination Actually Work?
Yes, you can use finasteride and minoxidil together. Here's what the evidence says about combining them, what results to expect, and how to use both safely.
Does Boron Increase Testosterone and Help with Erectile Dysfunction?
Boron is popular in natural ED circles, but does the evidence stack up? We look at what the research actually says and what treatments genuinely work.
How Much Protein Is in Chicken (And Why It Matters on a Weight Loss Programme)
From breast to drumsticks, here's exactly how much protein each chicken cut contains, plus why protein intake matters so much if you're using GLP-1 medications.
How Long Does Testosterone Treatment Take to Work?
Most men notice early changes within 3-6 weeks of starting TRT. Here's a realistic UK timeline of what to expect and when.
Dutasteride side effects: what the research actually shows
Worried about dutasteride side effects? Here's an honest, evidence-based look at what's common, what's rare, and how it compares to finasteride.
Mounjaro and Alcohol: Can You Drink While Taking It?
Wondering if alcohol is safe on Mounjaro? A UK pharmacist explains the risks, the surprising craving research, and practical tips for social drinking.
Minoxidil side effects: what to expect and when to worry
Most men tolerate minoxidil well, but side effects do happen. Here's an honest breakdown of what's common, what's rare, and what to do about it.
Tamsulosin and Erectile Dysfunction: What's the Connection?
Taking tamsulosin for BPH and worried about ED? A UK pharmacist explains the link, ejaculatory side effects, and whether you can safely take Viagra or tadalafil.
Wegovy Pill vs Injection: Which One Should You Choose?
A pharmacist breaks down how Wegovy tablets compare to the injection pen: results, side effects, dosing and UK pricing, so you can decide which suits you.
Wegovy Pill Now Available in the UK: Price, Cost and How It Compares to the Injection
Wegovy tablets are now available privately in the UK. Here's what the pill actually is, what it costs, and how it compares to the injection.
Where to Inject Testosterone, Semaglutide and Mounjaro: A Practical Guide
Not sure where to inject your medication? This guide covers injection sites, technique and rotation for testosterone, semaglutide and Mounjaro.
Saxenda Side Effects: A Practical Guide for UK Patients
From nausea in week one to rare but serious symptoms, here's what to expect from Saxenda and how to manage side effects at each stage of treatment.
Ezetimibe Side Effects, Including Hair Loss: What UK Patients Should Know
Ezetimibe can cause hair loss, but it's listed as 'not known' frequency in the UK SmPC. Here's what the evidence actually says, and when to act.
25 High-Protein, Low-Calorie Foods for Effective Weight Loss
Discover 25 protein-packed foods under 200 calories that keep you full longer and support sustainable weight loss without sacrificing taste or nutrition.
Early Signs of Male Pattern Baldness: What to Look For
Worried about hair loss? Learn to spot the early warning signs of male pattern baldness and discover proven treatments that can help preserve your hairline.
NAD Injections: Claimed Benefits, Real Risks and UK Regulatory Status
NAD injections are growing in popularity at UK wellness clinics. Here's what the science actually says, what the MHRA says, and what to ask before booking.
Mounjaro Drug Interactions: Which Medications to Watch Out For
Starting Mounjaro? Some medications can interfere with its effectiveness or cause dangerous side effects. Here's what you need to watch for.
How Long Does Finasteride Take to Work?
Most men start seeing results from finasteride between 3 and 6 months. Here's what to expect month by month, and when to know it's working.
How to Take the Wegovy Pill: Instructions, Timing and Tips
Oral semaglutide has strict dosing rules that affect how well it works. Here's how to take it correctly, why timing matters, and what the UK situation looks like.
The Wegovy pill: oral semaglutide for weight loss and when it's coming to the UK
The Wegovy pill (oral semaglutide 25mg) is now FDA-approved. Here's what UK adults need to know about availability, effectiveness, cost, and NHS access.
Wegovy Storage and Shipping: What to Do When Your Pen Arrives
Wegovy now ships without ice packs — here's exactly how to store your pens safely, what temperatures are fine, and when to be cautious.
Is porridge good for weight loss? A pharmacist's guide to oats
Porridge can support weight loss through its high fibre content and ability to keep you fuller for longer - but preparation matters for best results.
Why Mounjaro Makes You Feel Cold and What to Do About It
Feeling cold on Mounjaro is more common than the official leaflet suggests. Here's why it happens, how long it lasts, and how to manage it.
Is Nando's healthy? A pharmacist's guide to eating out while managing your weight
Yes, Nando's can fit into a healthy diet when you make smart choices. Learn which menu options support weight loss and which to avoid from a pharmacist.
Maintaining Your Weight Loss with Mounjaro
Reached your goal weight with Mounjaro? Learn how to maintain your results long-term with flexible dosing options and lifestyle strategies that work.
How to Store Mounjaro: Essential Storage Guidelines
Store Mounjaro pens correctly to maintain effectiveness. Refrigerate unused pens at 2-8°C or keep at room temperature for up to 30 days.
Mounjaro Needle Size: 4mm vs 6mm vs 8mm - Which is Best?
Confused about Mounjaro needle sizes? We explain why 4mm needles are recommended, how they compare to longer options, and tips for comfortable injections.
Does Rybelsus Cause Yeast Infections?
Rybelsus doesn't directly cause yeast infections, but diabetes itself increases your risk. Learn how to spot symptoms and protect yourself while taking this medication.
How Long Does Mounjaro Stay in Your System?
Mounjaro takes around 5 weeks to completely leave your body after your last injection. Here's what affects elimination and when to expect it cleared.
Can You Eat Bananas While Taking Mounjaro?
There's no medical reason to avoid bananas on Mounjaro. We explain the myths around potassium, blood sugar, and GI side effects with this popular fruit.
Spotting Fake Online Pharmacies When Buying GLP-1 Medications
How to identify legitimate vs rogue pharmacies when buying Mounjaro, Ozempic, or Wegovy online. Essential safety checks before you order.
Flying with Mounjaro: UK Airport Rules and Safe Storage Tips
Everything you need to know about taking Mounjaro on flights - UK airport security rules, proper storage methods, and essential travel documentation.
Can You Buy Mounjaro Over the Counter in the UK?
No, Mounjaro cannot be bought over the counter in the UK - it's prescription-only. Here's where you can legally get this weight loss medication.
Is Bass Safe to Eat? UK Guidelines on Mercury, Pregnancy, and Health Benefits
Bass is safe to eat when properly prepared, but pregnant women should limit intake to 2 portions per week due to mercury levels. Learn UK guidelines and benefits.
Does Coke Zero help with weight loss?
Exploring whether Coke Zero's zero calories translate to weight loss benefits, plus the surprising research on diet sodas and body weight.
Mounjaro Sulphur Burps: Causes, Duration and Effective Remedies
Experiencing egg-smelling burps on Mounjaro? Learn why they happen, how long they last, and proven ways to reduce them from dietary changes to OTC remedies.
How to dispose of your sharps bin safely in the UK
Using weight loss injections? Here's exactly where and how to dispose of your full sharps bin safely and legally in the UK, plus how to get a replacement.
How to Take Viagra Safely and Effectively
Essential dos and don'ts for taking Viagra, including timing, dosage, and what to avoid for the best results and minimal side effects.
Mounjaro Dosage Guide: From 2.5mg to 15mg Explained
Understand how Mounjaro doses increase from 2.5mg to 15mg over 16 weeks, which dose is most effective for weight loss, and what maintenance dosing involves.
When to Take Magnesium: Morning or Night Timing for Better Results
The timing of your magnesium supplement matters less than consistency, but certain forms work better at specific times for sleep, energy, and digestion.
How Much Protein Is in an Egg? Complete Nutritional Breakdown
A large egg contains 6.3g of complete protein with all essential amino acids. Discover egg nutrition facts and how they fit into your daily protein needs.
Calories in Medjool dates: nutritional facts and weight management tips
Discover exactly how many calories are in Medjool dates, their nutritional benefits, and how they fit into a healthy weight management plan.
Switching Between Mounjaro and Wegovy: What Actually Happens
Thinking of switching weight loss medications? Here's what your doctor considers when moving between Mounjaro and Wegovy, including dosing and timelines.
How to Take Mounjaro at Home: A Patient Guide from Totiva Health
A pharmacist-led guide from Totiva Health explaining how Mounjaro works and how to inject it safely at home, with clear steps and safety advice.
How to Take Wegovy at Home: A Patient Guide from Totiva Health
Learn how to take Wegovy safely at home with this pharmacist-written guide from Totiva Health, covering injection steps, dosing, and safety advice.