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Viagra has been shown to cause some mild side effects. Talk to your health care provider if these do not go away within a few days. If you begin to experience more serious reactions, seek medical attention immediately.

Common side effects reported from Viagra use include:

  • Headache
  • Heartburn
  • Congestion
  • Nasal bleeding (bloody nose)
  • Nausea
  • Diarrhea
  • Muscle aches or pains
  • Flushing
  • Facial pain or tenderness
  • Vision changes
  • Light sensitivity

More severe side effects include:

  • Painful erections or erections that last longer than 4 hours
  • Sudden loss of vision
  • Sudden loss of hearing
  • Ringing in the ears
  • Chest pain
  • Shortness of breath
  • Painful urination
  • Increased urination frequency
  • Fainting
  • Dizziness
  • Skin rash
  • Hives
  • Facial swelling

If you experience any of these side effects, seek medical attention immediately. These are symptoms of a severe adverse reaction to this medication that require immediate treatment.

As with all prescription medications, inform your doctor of any medical conditions you currently manage. Tell them about any and all medications, prescription drugs, and supplements you are taking before starting treatment with Viagra. Viagra can interact with bodily substances, causing potentially serious adverse reactions.

Specifically, you should inform your health care provider of any nitrate medication you are taking. Remember to mention any herbal products you use, especially St. John’s wort.

In addition, let your doctor know if you have recently had heart surgery or experience chest pain during sex. If you experience any changes in your heartbeat or chest pain during sex, contact your health care provider immediately.

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Be aware that while this may sound alarming, it is actually a sign that your health-related issues are being treated seriously. If you experience any unusual or severe symptoms, seek medical attention immediately. If you are experiencing any unexpected reactions, contact your health care provider.

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Be sure to inform your health care provider of any other prescription or over-the-counter (OTC) medications you are taking.

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This is not a complete list of potential side effects. Call your doctor for medical advice about any side effects. You may report side effects to FDA at 1-800-FDA-1088.

Report any unusual or severe symptoms or unusual results to the appropriate channels, such as the emergency room or immediately the emergency room. Report any unusual symptoms or unusual results to the channels, such as the emergency room or the emergency room. If you are experiencing any unusual or unique symptoms that are not apparent, contact your health care provider right away.

Sildenafil citrate, commonly known by the brand name, is a prescription-only medicine used to treat erectile dysfunction (ED) in adult men. It works by improving blood flow to the penis, helping to achieve and maintain an erection during sexual activity.

Dosage and Administration

Sildenafil is available in 25mg, 50mg, and 100mg strengths.

  • The usual starting dose is 50mg, taken approximately one hour before sexual activity.
  • Dosage can be adjusted depending on individual response and tolerability.
  • Take only one tablet in 24 hours, with or without food.
  • Avoid grapefruit juice, as it can increase the risk of side effects.
  • A high-fat meal may delay onset of action.

Effectiveness

Sildenafil has been shown to be effective in up to 80% of men with ED, with effects typically noticeable within 30 to 60 minutes, and lasting for up to 4–5 hours.

Side Effects

Common side effects include:

  • Headache
  • Flushing
  • Nasal congestion
  • Indigestion

Less common but serious effects include visual disturbances, hearing changes, or prolonged erections. Seek medical attention if severe or persistent side effects occur.

Contraindications

Sildenafil should not be used by those:

  • Taking nitrates for chest pain
  • With severe heart or liver conditions
  • Under 18 years of age
  • With certain medication interactions (e.g. alpha-blockers, antifungals, antibiotics)

Interactions

Inform your doctor of all medications and supplements before use. Interactions may occur with:

  • Nitrates
  • Alpha-blockers
  • Some antibiotics and antifungal medicines

Alcohol and Heart Conditions

Avoid excessive alcohol while taking sildenafil, as it can lower blood pressure and increase side effect risk. Use with caution if you have any heart-related conditions.

Availability and Cost

Sildenafil is available by prescription only in the UK.

  • Generic versions are more affordable than branded Viagra.
  • Supplied by licensed UK pharmacies such as Online Chemist.
  • Avoid counterfeit products from unregulated websites.

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Pfizer Ltd’s patent for Viagra was invalid before the FDA. However, the FDA has decided not to approve the generic version. The company also said it will “reduce its costs for marketing” by selling the generic version.

The generic version of Pfizer’s Viagra, which is produced in the US and is manufactured by Pfizer, is an impotence drug that contains sildenafil citrate as its active ingredient. The patent on Viagra expired in June 2013. However, Pfizer has not yet authorized generic versions of Viagra.

Viagra is one of the most popular medications for treating Erectile Dysfunction (ED). Viagra belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. It works by increasing blood flow to the penis, helping men get and keep an erection. Viagra is taken orally, typically as needed, about 30 minutes before sexual activity.

Viagra is available in three doses, 50mg, 100mg and 100mg. The dosage is based on your medical condition and response to treatment. The 100mg dose is taken about 30 minutes before sexual activity. Viagra is not recommended for men with certain medical conditions or those taking nitrate medications.

PDE5 inhibitors are designed to be effective only after sexual stimulation. The action of Viagra will not be influenced by physical arousal, but may be affected by arousal. Sexual stimulation is essential when taking Viagra, because it affects blood flow to the penis and it can cause sudden drops in blood pressure.

The Viagra patent has expired in several European countries. Germany has the largest market for the generic version of Viagra. Belgium and France have similar market sizes. The US and Canada are the other European countries.

VIAGRA 200 mg/5 mL Injection

Why is Pfizer not allowed to produce generic Viagra?

Pfizer is not allowed to produce generic Viagra, because it does not allow the generic version to be produced. The patent on Viagra expired in May 2013. Pfizer has not yet authorized generic versions of Viagra.

Why is the Viagra patent invalid?

Pfizer is not allowed to produce generic Viagra. The patent on Viagra expired in June 2013 in Europe. Pfizer is not allowed to produce generic Viagra in the US. Pfizer has not yet made generic Viagra available to men.

Viagra is not manufactured in the US. Viagra is not manufactured in other countries. In the EU, Viagra is manufactured by Pfizer. Pfizer is not allowed to manufacture generic Viagra in the EU. Pfizer is not allowed to make generic Viagra available to men in the US.

Viagra’s patent information

The company’s patent information is for Viagra and will expire in June 2013. The patent information on Viagra and will expire in May 2013.

Viagra’s generic patent

The generic version of Viagra, sildenafil citrate, is manufactured by Pfizer. Viagra is manufactured by Pfizer. Viagra will be protected by the US Food and Drug Administration (FDA) in the future.

Viagra’s expiration date

The expiration date of the generic Viagra patent will be announced at the end of this release. The company has not yet made the generic Viagra available to patients in the US.

Pfizer has not approved the generic version of Viagra since its patent expired in June 2013.

Viagra is not approved by the FDA in the US.

The company has not made generic Viagra available to women. Viagra is not approved to treat women with erectile dysfunction.

Viagra Connect Tablet

Does Pfizer have a patent for Viagra?

The company has not yet made a generic Viagra patent. However, the company has made a generic Viagra patent available to men under the brand name Viagra.

Viagra Connect

Why does Pfizer not make Viagra available to women?

Pfizer is not allowed to make generic Viagra available to women.

The company has not made generic Viagra available to men under the brand name Viagra.

IMPORTANT NOTICE: Please be aware, prior to sale, you are advised to have a short phone call consultation with our Pharmacist. Automatic purchase consents the Pharmacist to give you a quick call.

Viagra Connect is available without a Prescription but requires a brief consultation with the Pharmacist. It is available in a 4 pack or an 8 pack. Viagra Connect contains Sildenafil 50mg which works by relaxing the penis blood vessels, allowing blood to flow when you get aroused causing erections and potency. Viagra Connect will only help men become erect if you are aroused. Only for adult use, men 18 years plus.

How to be taken:

  • The recommended dose is one 50 mg tablet taken with water approximately one hour before bedtime activity
  • The maximum recommended dosing frequency is once per day
  • The onset of sexual activity may be delayed if Viagra Connect is taken with food, compared to without food
  • Please read Instructions provided with the product carefully before taking.

VIAGRA CONNECT is not to be taken if:

  • There is no problem with gaining erections.
  • Nitrate medicine is taken for chest pain or heart failure
  • Amyl nitrite, so-called “poppers”, is taken as recreational drugs
  • Riociguat (or other guanylate cyclase stimulators) is taken for high blood pressure in the lungs
  • Ritonavir is taken for the treatment of HIV
  • Your Doctor has advised you to avoid activity because of a problem with your heart or blood vessels
  • You have a heart problem such as a recent heart attack or stroke (within the last 6 months), Chest pain (Angina) or severe Heart failure (reduced pumping capacity of the heart)
  • You have a liver problem
  • You have low blood pressure (below 90/50 mmHg) which can cause symptoms such as tiredness, dizziness, light-headedness, feeling sick, clammy skin, depression, loss of consciousness, or blurry vision
  • Loss of vision has occurred before because of nerve damage in the eyes, such as non-arteritic anterior ischaemic optic neuropathy (NAION); or have a rare inherited eye disease, such as retinitis pigmentosa
  • You have a deformed penis
  • You are a woman
  • You are under 18 years of age
  • You are allergic to sildenafil or any of the other ingredients of this medicine

Please read instructions carefully provided.

Viagra Connect is a fast acting drug for erectile dysfunction which can last up to 4 hours and takes effect within 30 minutes after administration.

Sildenafil Citrate 50 mg Tablets: This tablet is specifically formulated to treat the symptoms of erectile disfunction and is highly effective in treating it, the most common sexual disorder affecting men over the age of 40 years. Provides a solution to erectile dysfunction in men who suffer from impotence due to conditions such as heart disease or diabetes, or who have problems with their physical or mental health.

Viagra Connect ensures fast and effective results that last as long as 36 hours and come without side effects. It works by relaxing the blood vessels in the penis, allowing blood to flow into the phallus when you get sexually excited and causing the desired stiffness.

IMPORTANT NOTICE: You are advised to have a short phone call consultation with our Pharmacist. The Science of PDE5ilation: A Prescription only medicine (S2) with a short consultation with the Pharmacist. It is available without a prescription only but it is important to be aware that it may not befits you well, whether you have a heart problem, diabetes, liver disease, kidney problems, or a past heart attack.

Sildenafil Citrate 50 mg Tablets: These tablets are specifically formulated to treat the symptoms of erectile dysfunction and are taken to help you achieve and maintain an erection during sexual activity. They offer a solution to erectile dysfunction in men who suffer from impotence which can cause problems with physical condition such as diabetes, heart disease, liver cirrhosis, or heart attack.