Can You Take Viagra With High Blood Pressure?

What is Erectile dysfunction?

Sexual health is an integral part of physical and mental health. Good sexual health depends on safe and equitable relationships as well as the availability of high-quality information and sexual health services, including medications to cure any disorder.

Erectile dysfunction, sometimes known as impotence, is the inability to achieve and maintain a penile erection that is sufficient for satisfactory sexual performance. Erection problems (impotence) are very common, particularly in men over 40. Most men occasionally fail to get or keep an erection. This is usually due to stress, tiredness, anxiety or drinking too much alcohol. It is usually nothing to worry about. However, if the erection problem keeps happening, one should see a GP or go to a sexual health clinic as it could be a sign of an underlying health condition which can be treated by addressing the precipitating causes.

 

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What is Viagra?Viagra-Blog

Viagra contains the active ingredient sildenafil citrate and it is available as 25, 50 and 100 mg tablets. Viagra is indicated in adult men with erectile dysfunction. It is useful in maintaining a healthy sexual life. With the exception of exercising caution in men with pre-existing conditions of the heart and blood vessels, Viagra is pretty safe to use under the advice of a medical practitioner.

Viagra should be taken at the recommended dose as needed approximately one hour before sexual activity. Based on the efficacy of the drug and your tolerability, you may be asked to increase or decrease the initial dose later on. If you have other medical conditions such as kidney function impairment or liver function impairment, the recommended dose will have to be adjusted accordingly. If Viagra is taken with food, the onset of action may be delayed compared to its use during the fasted state.

Does Viagra interact with other medicines?

Adult males who wish to take Viagra should be aware that it can interact with certain medicines, resulting in unwanted side effects. Most noted of these are simultaneous uses of Viagra and alpha-blocker medicines that dilate the blood vessels of the body, which can lead to an unwanted drop in blood pressure and effects such as dizziness and light-headedness as a result. Someone who is already taking medicines for various pre-existing health conditions should, therefore, seek proper medical advice before starting to use Viagra.

Can you take Viagra with high blood pressure?

Erectile dysfunction is often found in men with high blood pressure because of the hardening of the blood vessels in the penis and other associated risk factors. Sometimes, erectile dysfunction becomes the signalling factor to indicate that a person might have high blood pressure. Clinical studies on the use of Viagra to improve erectile dysfunction in these groups of patients have shown excellent response and safety profile.

Although Viagra causes small but clinically insignificant reductions in blood pressure in men with both normal and high blood pressure, clinical studies have shown that when used in accordance with the prescribing information and current treatment guidelines, Viagra is safe in younger and older men with or without hypertension.

Despite the fact that Viagra causes dilatation of blood vessels and a slight lowering of the blood pressure, clinical studies have shown that it does not exaggerate the blood pressure lowering effects of alcohol or medicines that are used to control high blood pressure. The decreases in blood pressures were found to be similar whether Viagra was taken alone or with commonly used medications for high blood pressure. Results of studies that have made such comparison have concluded that the acute, short-term effects of Viagra on blood pressure and heart rate in men with erectile dysfunction were small and not likely to be clinically significant in those taking medications for high blood pressure simultaneously. This suggested that there was no synergistic interaction between Viagra and medications for high blood pressure. Viagra can, therefore, be used by people who are taking medications to control their high blood pressure.

One study in which Viagra was used acutely in patients with high blood pressure that was not controlled by usual medications (resistant hypertension), an improvement in 24-hour blood pressure without significant side effects were observed – thus signifying a possible use of Viagra in the treatment of resistant hypertension in the future.

Many other beneficial effects of Viagra have been observed during clinical studies, and there is a possibility that Viagra might be used as a treatment not just for erectile dysfunction but for various other medical problems in the future.

 

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Description

How does Viagra and Sildenafil work?

Viagra (Sildenafil) helps men to get and maintain an erection when sexually stimulated and/or excited. The medicine relaxes the blood vessels in the penis which results in more blood flowing to the penis when you are sexually excited.

How do I take it?

You should take Viagra (Sildenafil) approximately 1 hour before planning to have intercourse. Within a window of between 30 minutes and 4 hours after you take the medicine, it will be easier to keep and maintain an erection when you are sexually excited. If you take this medicine after a meal with a high fat content it may take a little longer to start working. This medicine will only work when you are sexually excited. You won’t get an erection just by taking Viagra (Sildenafil).

Dosage

The standard recommended dose for Viagra (Sildenafil) is 50mg and this will be suitable for most people.  If this dose is not effective, you can try 100mg and if 50mg gives you side effects you can also reduce the dose to 25mg tablets.

You must not take more than 100mg daily of Sildenafil/ Viagra. Clinical trials have been conducted in patients taking up to 200mg sildenafil and it was found that ‘doses of 200mg did not result in increased efficacy but did increase the incidence of adverse reactions (headache, flushing, dizziness, dyspepsia, nasal congestion, and altered vision).’

In addition, in patients taking more than 100mg daily, there have been reports of rhabdomyolysis (a breakdown in skeletal muscle tissue the byproducts of which can lead to kidney failure), visual perception changes, vertebral artery dissection (a tear in the artery supplying blood to the brain), heart attacks and aggressive behaviour.

If the 100mg strength doesn’t work for you, there may be alternatives you can try and we recommend that you call us for a free consultation with our pharmacist or doctor to discuss any underlying conditions you may have. We recommend that all men taking medicine for erectile dysfunction have regular tests for blood pressure, cholesterol, diabetes and hormone imbalances. For instance, it may be that by fixing a hormone imbalance such as testosterone, your Viagra medication will be even more effective.

In addition, drug manufacturers do not advise patients to split tablets in half to get the correct dosage as they cannot guarantee that the active ingredient will be distributed evenly throughout the tablet.  For instance, if you cut a 100mg tablet in two, you may find that you get 80mg in one half of the tablet and 20mg in the other half leading to either an overdose (increased risk of side effects) or a suboptimal dose (the medication may not work).

It is important that you choose the correct dose for you. If you wish to talk to our pharmacist or doctor about this, please contact us in the pharmacy on 01625 460621 or email [email protected].

Side Effects

Viagra (Sildenafil) is normally well tolerated, however, side effects can include:

  • Headache
  • Dizziness
  • Nausea

Side effects normally subside after a few hours, however, if you experience a prolonged or painful erection (longer than 4 hours), then you must contact your doctor immediately.

Drug interactions

There are a number of medicines which interact with Sildenafil/ Viagra. For an exhaustive list please see the patient information leaflet (see section below) or call us in the pharmacy to discuss your specific situation. The main drug interactions are listed here:

Recreational drugs such as ‘poppers’ or amyl nitrate
Alpha blockers used for urinary retention or blood pressure problems (eg Flomax or Cardura)
Anti- arrhythmic drugs such as disopyramide
Antibiotics such as erythromycin
Antifungals such as itraconazole
Antivirals such as drugs used to treat HIV
Bosentan
Cobicistat
Calcium channel blockers to treat blood pressure and angina such as amlodipine
Dapoxetine (Priligy – used to treat premature ejaculation)
Grapefruit juice**
Nicorandil
Nitrates
Riociguat
Cimetidine (to treat stomach ulcers)

Please do not take Sildenafil/Viagra if you have taken any of the above drugs within the last 60 days without first consulting with either us in the Pharmacy ([email protected] / 01625 460621) or via email with our doctor [email protected].

**We advise not to take Sildenafil/Viagra with grapefruit juice as the blood concentration of Sildenafil will possibly be increased resulting in side effects.

Patient Information Leaflets

Please click here for the patient information leaflet for Viagra.

For Actavis Sildenafil please see the following leaflets: 100mg, 50mg, 25mg.

Storing Medicines Safely

Please keep your medicine out of the reach of children and store at room temperature.  Unwanted medicine can be disposed of by returning it to any local pharmacy or indeed to us here for us to dispose of it for you.

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Important points

Erectile dysfunction can also be psychological and as a result of unhealthy living. Changing the lifestyle can sometimes improve the sexual health. Measures such as losing weight if one is overweight; stopping smoking; eating a healthy diet; exercising daily; and, trying to reduce stress and anxiety might prove beneficial to many men who suffer erectile dysfunction.

Viagra is prescribed when an underlying vascular problem is suspected during a thorough evaluation of existing medical conditions and medications.

Viagra should only be taken as prescribed and any increment or decrease in the dose should be on the advice of a medical practitioner.

It may be harmful to take excessive doses of Viagra at one’s own discretion, especially if one has pre-existing heart or vascular conditions.

 

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REFERENCES:

  1. Erectile dysfunction (impotence) – NHS.UK. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/
  2. Aranda P, Ruilope LM, Calvo C, Luque M, Coca A, Gil de Miguel A. Erectile dysfunction in essential arterial hypertension and effects of sildenafil: results of a Spanish national study. Am J Hypertens. 2004 Feb; 17(2):139-45. https://www.ncbi.nlm.nih.gov/pubmed/14751656
  3. Santa Catharina A, Modolo R, Ritter AM, Quinaglia T, de Amorim RF, Moreno H, de Faria AP. Acute Sildenafil Use Reduces 24-Hour Blood Pressure Levels in Patients With Resistant Hypertension: A Placebo-Controlled, Crossover Trial. J Clin Hypertens (Greenwich). 2016 Nov; 18(11):1168-1172. doi: 10.1111/jch.12850. Epub 2016 Jun 1. https://www.ncbi.nlm.nih.gov/pubmed/?term=ARthur+santa+Catharina
  4. Vardi Y, Klein L, Nassar S, Sprecher E, Gruenwald I. Effects of sildenafil citrate (Viagra) on blood pressure in normotensive and hypertensive men. Urology. 2002 May; 59(5):747-52. https://www.ncbi.nlm.nih.gov/pubmed/11992853
  5. David J Webb, Stephen Freestone, Michael J Allen, Gary J Muirhead. Sildenafil citrate and blood-pressure-lowering drugs: results of drug interaction studies with an organic nitrate and a calcium antagonist. The American Journal of Cardiology. March 4, 1999Volume 83, Issue 5, Supplement 1, Pages 21–28. http://www.ajconline.org/article/S0002-9149(99)00044-2/pdf
  6. Zusman RM, Prisant LM, Brown MJ. Effect of sildenafil citrate on blood pressure and heart rate in men with erectile dysfunction taking concomitant antihypertensive medication. Journal of Hypertension: December 2000 – Volume 18 – Issue 12 – p 1865–1869. https://www.ncbi.nlm.nih.gov/pubmed/11132612

Assured Pharmacy is not liable for the currency or accuracy of the information contained in this blog post. For specific information about your personal medical condition, please contact our doctors or pharmacists for advice on [email protected]