What Happens When You Take Too Much Viagra?

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Viagra is one of the treatments for erectile dysfunction available for sale here at Assured Pharmacy. To help our clients understand their medications and medical conditions, we’ve written a series of articles on our blog that will provide further information about different conditions and medications.
This article is about what happens when you take too much Viagra. To help you understand the subject, we’ll cover what Viagra is, what it is used for, how to take it and what may happen when you take more than the recommended dose.

 

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What is Viagra?

Viagra is the brand name for a medication known as Sildenafil. It belongs to the pharmacotherapeutic group known as Urologicals.
Each film coated tablet contains Sildenafil citrate equivalent to 25, 50 or 100 mg of sildenafil. Viagra (Sildenafil) tablets are blue rounded diamond-shaped tablets, marked with “PFIZER” on one side and “VGR 25, 50 or 100″ on the other.

The other substance (excipient) with known effect in each film coated Viagra (Sildenafil) tablet is lactose. VIAGRA 25 mg film-coated tablets contain 0.834 mg lactose (as monohydrate), VIAGRA 50 mg film-coated tablets contain 1.667 mg lactose (as monohydrate) and VIAGRA 100 mg film-coated tablets containing 3.334 mg lactose (as monohydrate).

The other substances (excipients) in each Viagra (Sildenafil) tablet, that are inactive, include:

Tablet core

  • microcrystalline cellulose
  • calcium hydrogen phosphate (anhydrous)
  • croscarmellose sodium
  • magnesium stearate

Film coat

  • hypromellose
  • titanium dioxide (E171)
  • lactose monohydrate
  • triacetin
  • indigo carmine aluminium lake (E132)

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The legal category for Viagra (Sildenafil) is POM. This means that this medication is a prescription only medicine and it can only be supplied or sold according to the instructions in a prescription issued by a duly qualified and registered doctor or non-medical prescriber.
You should not buy this or any other prescription-only medication without first speaking to a duly qualified and registered healthcare professional like a doctor or non-medical prescriber.

 

What is Viagra used for?

Sildenafil is indicated for the treatment of Erectile Dysfunction, Digital Ulcers (associated with systemic sclerosis) and Pulmonary Arterial Hypertension.
Treatment for Pulmonary Arterial Hypertension with Sildenafil can only be initiated under the supervision of a specialist clinician.
Please note that the brand Viagra is indicated for the treatment of Erectile Dysfunction only. For it to be effective as a treatment for Erectile Dysfunction, sexual stimulation is needed.

 

How do you take Viagra?

The recommended initial dose of Viagra is one 50 mg tablet taken as needed roughly one hour before sexual activity. Depending on how effective that dose was and how you tolerated it, you may increase the next dose 100 mg or decrease it to 25 mg.
The maximum recommended dose of Viagra you can take at any one time is 100 mg. The maximum number of times you can take Viagra tablets is once a day. If VIAGRA is taken with food, the onset of action may be delayed compared to when you take it on an empty stomach.

What Happens When You Take Too Much Viagra?

In single-dose volunteer studies of doses up to 800 mg Viagra, the adverse reactions reported were similar to those seen at lower doses. However, the incidence rates and the severities of the adverse reactions were increased. Doses of 200 mg Viagra did not result in any increase in effectiveness but the incidence of adverse reactions (headaches, flushing, dizziness, dyspepsia, nasal congestion, altered vision) was increased.

 

What are the reported adverse effects of taking Viagra?

In the table below, all medically important adverse reactions that occurred in clinical trials at an incidence greater than placebo are listed by system organ class and frequency (very common (≥1/10), common (≥1/100 to <1/10), uncommon (≥1/1,000 to <1/100), rare (≥1/10,000 to, 1/1,000).
Within each frequency grouping, undesirable effects from taking Viagra are presented in order of decreasing seriousness.

System Organ ClassVery CommonCommonUncommonRare
Infections and infestationsRhinitis
Immune system disordersHypersensitivity
Nervous system disordersHeadacheDizzinessSomnolence,
Hypoaethesia
Cerebrovascular accident,
Transient ischaemic attack,
Seizure*,
Seizure recurrence*,
Syncope
Eye disordersVisual colour distortions**,
Visual disturbance,
Vision blurred
Lacrimation disorders***,
Eye pain,
Photophobia,
Photopsia,
Ocular hyperaemia,
Visual brightness,
Conjuctivitis
Non-aerteritic anterior ischaemic optic neuropathy (NAION),
Retinal vascular occlusion*,
Retinal haemorrhage,
Arteriosclerotic retinopathy,
Retinal disorder,
Glaucoma,
Visual field defect,
Diplopia,
Visual acuity reduced,
Myopia,
Asthenopia,
Vitreous floaters,
Iris disorder,
Mydriasis,
Halo vision,
Eye oedema,
Eye swelling,
Eye disorder,
Conjunctival hyperaemia,
Eye irritation,
Abnormal sensation in eye,
Eyelid oedema,
Scleral discoloration
Ear and labyrinth disordersVertigo,
tinnitus
Deafness
Cardiac disordersTachycardia,
Palpitations
Sudden cardiac death*,
Myocardial infarction,
Ventricular arrhythmia*,
Atrial fibrillation,
Unstable angina
Vascular disordersFlushing,
Hot flush
Hypertension,
Hypotension
Respiratory, thoracic and mediastinal disordersNasal congestionEpistaxis,
Sinus congestion
Throat tightness,
Nasal oedema,
Nasal dryness
Gastrointestinal disordersNausea,
Dyspepsia
Gastro oesophageal reflux disease,
Vomiting,
Abdominal pain upper,
Dry mouth
Hypoaethesia oral
Skin and subcutaneous tissue disordersRashStevens-Johnson Syndrome (SJS)*,
Toxic Epidermal Necrolysis (TEN)
Musculoskeletal and connective tissue disordersMyalgia,
Pain in extremity
Renal and urinary disordersHaematuria
Reproductive system and breast disordersPenil haemorrhage,
Priapism*,
Haematospermia,
Erection increased
General disorders and administration site conditionsChest pain,
Fatigue,
Feeling hot
Irritability
InvestigationsHeart rate increased

 

* Reported during post-marketing surveillance only

** Visual colour distortions: Chloropsia, Chromatopsia, Cyanopsia, Erythropsia  and Xanthopsia

*** Lacrimation disorders: Dry eye, Lacrimal disorder and Lacrimation Increased

 

 

Reporting of suspected adverse reactions

Reporting of all suspected adverse reactions is important. It allows for continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals and patients are asked to report any suspected adverse reactions via the Yellow Card Scheme.
You can find out more information about the Yellow Card Scheme by clicking here.

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Is there anything else I need to know about Viagra?

For Viagra (Sildenafil) to be effective as a treatment for Erectile Dysfunction, sexual stimulation is required.
Physical examination should be undertaken to diagnose erectile dysfunction and determine potential underlying causes before pharmacological treatment is considered.
Should you get an erection that lasted longer than 4 hours, you need to seek urgent medical assistance. This is known as priapism. If priapism is not treated immediately, it may lead to penile tissue damage. This, in turn, could lead to a permanent loss in potency.

Should you develop any sudden visual defects, you should stop taking Viagra (Sildenafil) and speak to your prescriber or other health care professionals immediately.
Viagra (Sildenafil) contains lactose, it should not be taken by men with rare hereditary problems of galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption.
Viagra (Sildenafil) is not indicated for use by women or anyone under the age of 18 years.
Dizziness and altered vision have been reported in clinical trials with Viagra (Sildenafil). Thus, you need to be aware of how you react to VIAGRA (Sildenafil), before driving or operating any machinery.
Whilst Sildenafil may be used as a treatment for Digital Ulcers (associated with systemic sclerosis), this is not a licensed indication.
Sildenafil is available under other brand names, not just Viagra. It is also available as generic Sildenafil.

 

Finally, keep in mind that taking more than the recommended dose of Viagra does nothing but increase your chances of suffering from side effects. Taking too much Viagra has no benefits.
***
If you would like more information about Viagra (Sildenafil), please click here to fill out our contact form. Alternatively, you may call us on 01625 460 621.
Should you need urgent medical assistance, please dial 999.
If you would like to speak with our in-house doctor about getting Viagra (Sildenafil), please click here to start your remote consultation. Make sure you provide as much detail as you can about your health and any medications you take.
The onset of effect of Sildenafil may be delayed if taken with food.

 

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References

  1. https://bnf.nice.org.uk/drug/sildenafil.html
  2. https://bnf.nice.org.uk/drug/sildenafil.html#indicationsAndDoses
  3. https://www.medicines.org.uk/emc/product/7978#EXCIPIENTS
  4. https://www.medicines.org.uk/emc/product/7978#INDICATIONS
  5. https://www.medicines.org.uk/emc/product/7978#CLINICAL_PRECAUTIONS
  6. https://www.medicines.org.uk/emc/product/7978#MACHINEOPS
  7. https://bnf.nice.org.uk/drug/sildenafil.html#unlicensedUse
  8. https://bnf.nice.org.uk/drug/sildenafil.html#patientAndCarerAdvice
  9. https://bnf.nice.org.uk/drug/sildenafil.html#indicationsAndDoses
  10. https://bnf.nice.org.uk/medicinal-forms/sildenafil.html
  11. https://www.medicines.org.uk/emc/product/7978#OVERDOSE
  12. https://www.medicines.org.uk/emc/product/7978#UNDESIRABLE_EFFECTS
  13. http://www.mhra.gov.uk/yellowcard

 

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].