Pharmacy knowledge base
Health guides & medicine information
Plain-English explainers from our pharmacy team — what the medicines do, how the strengths differ, and how to use them safely.
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Erectile Products for Men: A Complete Overview
Summary: Erectile dysfunction treatments share the same core active ingredients — PDE5 inhibitors like sildenafil and tadalafil — but come in several formats including standard tablets, oral jelly, effervescent tablets, chewables, and combination tablets, each suited to different preferences around swallowing, discretion, or routine. Choosing a format is mostly about personal convenience, while strength, frequency, and suitability should always be confirmed with a doctor or pharmacist and the patient information leaflet.
Why generic sildenafil and Cialis have 20 brand names
Summary: Kamagra, Cenforce, Fildena, Sildamax, Suhagra and Silagra are all sildenafil. Vidalista, Tadalista and Tadaga are all tadalafil. The molecule is identical and off-patent; the brand name only tells you which manufacturer made it and in what format. Here's how to read a generic name, why the prices differ anyway, and which differences actually matter.
Eroxon gel: availability, evidence and how it compares
Summary: Eroxon (MED3000) is a topical ED gel launched in UK pharmacies in April 2023 and stocked by Boots, Superdrug and online pharmacies. It's the only ED product in Europe genuinely available with no prescription and no pharmacist gate — because it's regulated as a medical device, not a medicine. It works within about 10 minutes and suits men who can't take PDE5 tablets. We don't sell it; here's the honest comparison.
How to get a Viagra prescription: every legitimate route
Summary: There are four legitimate routes to sildenafil in the UK — your GP on the NHS, a private prescription, a regulated online doctor service, and the pharmacy route (Viagra Connect, which needs a pharmacist consultation but no prescription). Across the EU it is prescription-only in most countries. This guide covers what you'll actually be asked, what it costs, and what makes someone ineligible.
"Over the counter" Viagra: what that actually means
Summary: "Over the counter" does not mean "off the shelf". In the UK, sildenafil 50mg is a pharmacy (P) medicine — no prescription, but a pharmacist must assess you and can refuse. Nothing containing sildenafil is sold from open shelves anywhere in the UK or EU. The only genuinely shelf-available ED product in Europe is a topical gel regulated as a device. Here's what each label actually permits.
Cenforce 150 vs Cenforce 200: which upper strength fits?
Summary: Cenforce 150 and 200 are both above the 100mg regulator-standard maximum sildenafil dose — 150 is the measured step up when a properly-used 100 falls short; 200 is the ceiling, with the heaviest side-effect load and the narrowest genuine audience. Same molecule, same 4–6 hour window, same rules; the difference is intensity and tolerability. Most men needing 'more than 100' should try 150 first.
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Hydroxychloroquine (HCQS): what it treats and how it's used
Summary: Hydroxychloroquine (HCQS) is a disease-modifying antirheumatic drug — the backbone treatment for lupus and a standard option in rheumatoid arthritis, taken long-term at 200–400mg daily. It calms overactive immune signalling over 6–12 weeks, not overnight. Its one famous risk, retinal toxicity, is rare, dose-dependent and screened for with routine eye checks.
How long does tadalafil last? The 36-hour window explained
Summary: Tadalafil lasts up to 36 hours — a half-life of 17.5 hours gives it the longest window of any ED medicine, covering a whole weekend from one Friday dose. Onset is 30–45 minutes, food barely matters, and the dose changes intensity, not duration. Here's the hour-by-hour reality, the overlap rule for redosing, and when the long window is the wrong choice.
Pregabalin and alcohol: the interaction nobody should test
Summary: Pregabalin and alcohol both depress the central nervous system by different mechanisms, and combined they potentiate — heavy sedation, dizziness, blackouts and, at the dangerous end, suppressed breathing. This pairing features in a large share of pregabalin-related deaths, almost always alongside misuse doses or opioids. On a stable therapeutic dose, the occasional single drink is a doctor conversation, not a green light.
Amoxicillin and alcohol: what actually happens if you drink
Summary: Moderate alcohol doesn't stop amoxicillin working and doesn't cause the violent reaction people fear — that belongs to metronidazole, a different antibiotic. The NHS confirms drinking in moderation is acceptable with amoxicillin. The honest caveats: alcohol worsens the illness symptoms, burdens recovery, and a handful of OTHER antibiotics genuinely are dangerous with drink — so know which one you're holding.
Zopiclone and alcohol: why the combination is a hard no
Summary: Alcohol and zopiclone both depress the central nervous system, and together they multiply rather than add — deeper sedation, suppressed breathing, memory blackouts, sleepwalking and next-morning impairment. The NHS position is unambiguous: do not drink while taking zopiclone. Here's the pharmacology behind the rule and how to handle the real-world situations around it.
Can you take zopiclone every night? What tolerance really does
Summary: No — zopiclone is licensed for short courses of up to 4 weeks because nightly use breeds tolerance (the dose stops working), dependence (sleep collapses without it) and rebound insomnia on stopping. Here's the honest timeline of what nightly use does, how to use zopiclone so it keeps working, and the exit route if you're already past the guideline.