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 49–60 of 287 guides
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ED Medication and Alcohol: What You Need to Know
Summary: A small amount of alcohol is usually compatible with ED medicines, but heavier drinking works against them. Alcohol and PDE5 inhibitors both lower blood pressure, so together they can cause dizziness, headache or fainting, and alcohol itself impairs erections. Never combine ED medicines with nitrates, and ask a doctor first if you take blood-pressure tablets.
ED Medication, Food and Timing: Getting the Best Results
Summary: Food matters most for sildenafil: a heavy or fatty meal delays its onset, so take it on a lighter stomach. The EMA product information for Viagra advises taking it about 1 hour before sex. Tadalafil is much less affected by food, and vardenafil sits in between. A slower effect after a big meal does not mean the medicine failed.
Tadalafil: Daily vs On-Demand Dosing Explained
Summary: Tadalafil can be taken as a larger dose before expected sex or as a lower dose every day. The EMA product information for Cialis reports that an on-demand dose can work for up to 36 hours, which suits occasional sex; daily dosing suits men who are often active and want spontaneity. A doctor decides which approach and dose fit.
Managing ED Medication Side Effects Safely
Summary: Most side effects of ED medicines are mild and pass on their own: headache, facial flushing, indigestion and a blocked nose are the most common. Drinking water, resting and limiting alcohol help. Get urgent help, calling 112 if needed, for chest pain, sudden loss of vision or hearing, or a painful erection that will not go down.
Zopiclone for Insomnia: A Short-Term Guide
Summary: Zopiclone is a prescription 'Z-drug' sleeping tablet that helps you fall asleep faster and stay asleep. It is only for a short course for severe, short-lived insomnia, usually a few days to a few weeks. Longer use risks tolerance and dependence. Your doctor sets the dose and timing; never combine it with alcohol or drive the next morning if drowsy.
Modafinil and Shift-Work Sleep Disorder
Summary: In the EU, modafinil is authorised only for excessive sleepiness caused by narcolepsy. In 2010 the EMA concluded its benefits did not outweigh its risks for shift-work sleep disorder. Shift-work sleepiness is managed first with lighting, planned naps and steady routines. Modafinil also makes hormonal contraception less reliable, so any use needs a doctor's supervision.
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Kamagra Oral Jelly vs tablets: which is right for you?
Summary: Kamagra Oral Jelly and Kamagra tablets both contain 100mg of sildenafil, with the same safety rules and one dose in 24 hours at most. The difference is format: the jelly is a flavoured sachet swallowed without water, the tablet is more discreet to carry. A heavy meal delays absorption with either.
Amoxicillin: Uses, Safety and Why You Must Finish the Course
Summary: Amoxicillin is a penicillin antibiotic for bacterial infections such as chest, ear, nose and throat, urinary and some dental and skin infections. It has no effect on viruses, so it will not help a cold, flu or most sore throats. If it is prescribed, finish the full course: stopping early lets infections return and feeds antibiotic resistance.
What is Pregabalin used for?
Summary: Pregabalin is authorised in the EU for nerve pain, add-on treatment of partial seizures in epilepsy, and generalised anxiety disorder. That is according to the EMA product information for Lyrica. It often causes drowsiness and dizziness, can cause dependence, and must not be stopped abruptly. Only take it as prescribed, and avoid alcohol.
Kamagra Oral Jelly: Flavours and How It's Used
Summary: Kamagra Oral Jelly is sildenafil, the active ingredient in Viagra, as a flavoured gel in single-dose sachets. You swallow it straight from the sachet, no water needed. Flavours such as strawberry, pineapple and banana change the taste only, not the strength or how it works. The EMA guidance for sildenafil is to take it about 1 hour before sex.
How long does Kamagra take to work?
Summary: In EMA-reviewed trials, sildenafil (the drug in Kamagra) produced an erection firm enough for sex after a median 25 minutes, range 12–37. It still worked 4–5 hours after a dose. Take it about an hour before sex; a meal can delay absorption by about an hour, and it only works with arousal.
Fildena vs Kamagra: Comparing Two Sildenafil Brands
Summary: Fildena and Kamagra both contain sildenafil, so they work the same way and carry the same safety rules. The differences are the maker and the formats: Kamagra is made by Ajanta Pharma and is known for its oral jelly, while Fildena is made by Fortune Healthcare and is mainly sold as colour-coded tablets. Neither works without arousal.