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Viagra Side Effects.
Viagra is the most popular medication for erectile dysfunction, and is safe and effective for most men. However, it can cause side effects for less than 2% of men who use it. These side effects usually aren’t serious and most go away after a few hours.
If you’re worried about getting side effects from Viagra, we have a few tips for keeping your risk low and a doctor can help you find the right dose for you.
Contents.
What are the side effects of Viagra?
Common side effects (affect up to 1 in 10 people who use Viagra):
Nausea (feeling sick Facial flushing (face turning red) Hot flush (sudden feeling of heat in your upper body) Indigestion Your vision changing colour Blurred vision Visual disturbances Stuffy nose Dizziness.
Vomiting (throwing up) Skin rash Eye irritation Bloodshot or red eyes Eye pain Seeing flashes of light Thing looking brighter than normal Light sensitivity Watery eyes A pounding heartbeat Rapid heartbeat High blood pressure Low blood pressure Muscle pain Feeling sleepy A reduced sense of touch Vertigo (feeling things are moving or spinning around) A ringing in your ears Dry mouth Blocked or stuffy sinuses Inflammation of the lining of the nose (symptoms include runny nose, sneezing and a stuffy nose) Pain at the top of your stomach Gastro-oesophageal reflux disease (acid reflux, symptoms include heartburn) Blood in urine (pee) Pain in the arms or legs Nosebleed Feeling hot Feeling tired.
Fainting Stroke Heart attack Irregular heartbeat Temporary decreased blood flow to parts of the brain Feeling of tightening of the throat A numb mouth Bleeding at the back of the eye Double vision Reduced sharpness of vision Abnormal sensation (strange feeling) in the eye Swelling of the eye or eyelid Seeing small particles or spots in your vision Seeing halos (rings of colour) around lights, Dilation of the pupil of the eye (your pupil looking bigger) Discolouration (colour change) of the white part of your eye Penile bleeding Blood in semen A dry nose Swelling of the inside of the nose Feeling irritable Having trouble hearing or losing hearing completely.
When side effects are an emergency.
If you get any of the following serious side effects, or signs of an allergic reaction, you should get emergency medical help by calling 111 or 999 or see the NHS page on emergency medical services.
Serious side effects: An allergic reaction: Sudden wheezing or chest tightness Trouble breathing or dizziness Swelling of the eyelids, face, lips, or tongue Chest pain Ongoing painful erections Vision getting worse or loss of vision Serious skin reactions: Severe peeling and swelling Blistering around the mouth, genitals, and eyes Fever.
Does Viagra cause blood pressure problems?
Viagra can cause changes in blood pressure for some men, and both high and low blood pressure are listed as uncommon side effects of taking Viagra. Studies show that Viagra does drop blood pressure in men who take it, whether they already have blood pressure problems or not. This drop is considered to be ‘clinically insignificant’, which means it’s not going to cause health problems for most men.
This effect Viagra has on blood pressure is not surprising since it was discovered by accident when scientists were looking for new blood pressure treatments. This change in blood pressure is related to how Viagra works and is part of the reason why Viagra makes it easier to get erections.
How long do side effects last?
Most men find their side effects go away after 1 hour, and after 12 hours almost all side effects go away. The table below shows what percentage of men still have side effects after a certain amount of time after taking a dose of Viagra.
Time after taking Viagra % of men still experiencing side effects 18 mins Less than 90% 24 mins Less than 90% 30 mins Less than 80% 54 mins Less than 70% 1 hour Less than 50% 3 hours Less than 30% 7 hours Less than 20% 12 hours Less than 10% Over 12 hours 3%
Are there long-term side effects?
Looking at the long-term effects of Sildenafil, research shows that the number of men stopping treatment because of side effects remains very low – less than 1%. Men appear to be able to take Sildenafil long term without serious risk to their health, and without an increased chance of getting side effects.
Plus, evidence shows that men who take Sildenafil long term still find their treatment effective and don’t become resistant to it. This means that it’s safe to take Viagra for as long as you need it.
Do higher doses make Viagra side effects worse?
There’s a small increase in your chance of getting side effects as the dose of Viagra goes up. Still, there’s only a less than 2% chance of side effects across all doses.
This table shows the percentage of men who get certain side effects from Viagra, based on the dose they take. This shows that of the small percentage of men who get side effects, 16% of them will get a headache when taking 25mg of Viagra.
Common side effect 25 mg 50mg 100mg Headache 16% 21% 28% Flushing 10% 19% 18% Dyspepsia 3% 9% 17% Abnormal vision 1% 2% 11% Nasal congestion 4% 4% 9% Back pain 3% 4% 4% Myalgia 2% 2% 4% Nausea 2% 3% 3% Dizziness 3% 4% 3% Rash 1% 2% 3%
See our page on Viagra Dosages for more information on the different doses of Viagra.
Are side effects different for generic or over the counter Viagra?
The side effects of Viagra and over the counter Viagra Connect are the same. This is because they share the same active ingredient, sildenafil citrate.
This is also the case with Sildenafil, the generic version of Viagra, which also has exactly the same active ingredient and dosages as Viagra, the possible side effects. And your chance of getting them, will be the same.
But, since different manufacturers put slightly different ingredients in their tablets, you could see some difference in side effects between Viagra and Sildenafil from different companies. For example, some manufacturers use lactose in their tablets and some don’t, which might cause a reaction for people with lactose intolerance.
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View Erectile Dysfunction Treatments.
Are side effects worse for older men?
There isn’t a lot of difference in the side effects experienced by older men compared to younger men. Research shows even most men over 70 can tolerate Viagra treatment without any serious problems.
As you get older, your chance of getting other health conditions that could make Viagra unsafe does go up, so some older men may need to take lower doses of Viagra. Also as you get older your body may get less efficient at removing Viagra from your system, so side effects may last a little longer than they would for younger men.
Does alcohol cause side effects?
Alcohol doesn’t have a serious reaction with Viagra so you can drink in moderation and use Viagra safely.
But, alcohol does make it more likely that you will get side effects from Viagra. Alcohol also makes it harder for you to get and keep erections, so drinking alcohol can make Viagra less effective.
You can find more information on our page about taking alcohol and Viagra at the same time.
Other causes of side effects?
Does Viagra give women side effects?
Studies on women using Viagra show that they get similar side effects to men taking Viagra, and don’t get any extra serious side effects. One instance of female genital bleeding was recorded, similar to the rare side effect of penile bleeding in men.
Even if some research suggests Viagra might be able to help with female sexual disorders, there isn’t enough evidence to support treatment. Because of this, and the risk of side effects that comes with Viagra, doctors can’t prescribe Viagra to women with sexual disorders.
Since women in the UK can’t get approved for Viagra treatment, it means they can’t be sure it’s safe for them to take it. Even if many women would only get mild side effects, if a doctor hasn’t made sure it’s safe, taking Viagra could come with a risk of serious or even life-threatening side effects.
Does fake/herbal Viagra cause side effects?
There’s a wide range of different products marketed as a herbal alternative to Viagra, so it’s hard to say exactly what side effects they might cause.
Many of these kinds of products aren’t properly regulated, and it’s hard to be certain of what ingredients are in them or how they are made. This means that they could have ingredients that cause side effects, possibly even serious ones. Some of these products may also contain unsafe amounts of actual medication, or combinations of medications, which could put you at risk of serious side effects.
Rather than put your health and your wallet at risk with potentially ineffective and unsafe products, it’s better to get authentic treatment, either online or from your GP or pharmacist.