Pharmacy knowledge base
Health guides & medicine information
Plain-English explainers from our editorial team — what the medicines do, how the strengths differ, and how to use them safely.
Showing 1–12 of 287 guides
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“Liquid Viagra”: What People Actually Mean — and the Real Options
Summary: There is no official product called 'liquid Viagra'; the phrase describes sildenafil in a form that isn't a hard tablet. The real options are effervescent tablets you dissolve in water and oral jelly sachets, both with the same active ingredient as a standard tablet. The format changes convenience, not strength, and the safety rules stay the same.
The “Blue Salt Trick” for ED: Does It Actually Work?
Summary: No. The viral 'blue salt trick', a supposed at-home mix said to work like Viagra, has no clinical evidence, no defined recipe and no plausible way to improve blood flow the way erections require. It is internet folklore, not medicine. The proven options are PDE5 inhibitors such as sildenafil and tadalafil, used with a doctor's or pharmacist's advice.
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, so the brand name only tells you which manufacturer made it and in what format. Prices differ because of packaging, pack size and supply, not because one brand is stronger.
Eroxon gel: availability, evidence and how it compares
Summary: Eroxon (MED3000) is a topical gel for erectile dysfunction that is a medical device, not a medicine, so pharmacies sell it over the counter. It is sold in several European countries and contains no PDE5 inhibitor, making it an option for men who cannot take sildenafil or tadalafil. Kam4eu does not sell it; this is an independent comparison.
How to get a Viagra prescription: every legitimate route
Summary: In the EU and EEA, sildenafil is a prescription-only medicine, and there are three legitimate routes to a prescription. They are your own family doctor, a specialist such as a urologist, or a licensed telemedicine service. A prescription from a doctor in one EU country is valid in the others. Expect questions about your heart, blood pressure and medicines.
"Over the counter" Viagra: what that actually means
Summary: 'Over the counter' does not mean 'off the shelf'. Across the EU and EEA, sildenafil is a prescription-only medicine, and nothing containing it is sold from open shelves. The only ED product sold over the counter in a number of European countries is Eroxon, a topical gel regulated as a medical device rather than a medicine.
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Amoxicillin and alcohol: what actually happens if you drink
Summary: Moderate alcohol doesn't stop amoxicillin working or cause the violent reaction people fear; that belongs to metronidazole. Its product information lists no interaction with alcohol. The caveats: alcohol worsens illness symptoms and slows recovery, and a handful of other antibiotics genuinely are dangerous with drink, so know which one you're holding.
Cenforce 100 review: what to expect, honestly
Summary: Cenforce 100 is Centurion Laboratories' generic sildenafil 100mg, the same active ingredient and dose as full-strength Viagra. It costs a fraction of the price. The EMA product information for Viagra advises taking sildenafil about 1 hour before sex, and side effects match any sildenafil. Some men do better on a lower strength or a different molecule.
Vidalista 20: how long does it last? The 36-hour window explained
Summary: Vidalista 20 (tadalafil 20mg) can work for up to 36 hours, the window the EMA product information for Cialis reports. That is why tadalafil is nicknamed the weekend pill. It doesn't mean a 36-hour erection: it means a day and a half in which arousal works normally. Heavy drinking can blunt it, and nitrates are never safe with it.
Kamagra Oral Jelly: does it work? What the sachet really does
Summary: Yes. Kamagra Oral Jelly works like a sildenafil tablet because each sachet contains 100mg of sildenafil, the active ingredient of Viagra. In EMA-reviewed trials, sildenafil's median time to a usable erection was 25 minutes, with arousal. When it seems to fail, the usual causes are a heavy meal, alcohol, no arousal or a counterfeit sachet.
Carisoprodol 500mg (Pain-O-Soma): uses, risks and the honest rules
Summary: Carisoprodol 500mg, sold as Pain-O-Soma 500, is a muscle relaxant for short courses of acute muscle pain. The EMA recommended suspending all EU carisoprodol authorisations in 2007 because of abuse, addiction and impairment risks. It causes drowsiness, must never be mixed with alcohol and carries genuine dependence potential. Use it only as a prescriber directs.
Zopiclone 7.5mg vs 10mg: the honest guide to sleeping-tablet doses
Summary: 7.5mg is the standard adult dose of zopiclone for short-term insomnia. 10mg is a higher strength that adds sedation and side effects rather than better sleep. Zopiclone is a short-course medicine, usually two to four weeks at most, not a long-term habit. Expect possible next-day drowsiness, don't drive if affected, and never combine it with alcohol.