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ED Trial Packs (Viagra, Cialis, Levitra)

 

ED Trial Packs (generic Viagra, Cialis, Levitra) Review

brand name: Viagra
generic names: Sildenafil citrate, Sildenafil, Isosorbide dinitrate

How does it work?

Viagra tablets contain the active ingredient sildenafil, which is a medicine used in the treatment of erectile dysfunction (impotence). Sildenafil is called a phosphodiesterase type 5 inhibitor, and works by preventing the action of a chemical in the body called phosphodiesterase type 5.

An erection is produced via a complex chain of events, involving signals from the nervous system and the release of chemical messengers within the tissues of the penis. One of these chemical messengers is called cyclic GMP.

Cyclic GMP causes the blood vessels in the penis to widen by relaxing a thin layer of muscle found in the blood vessel walls. This allows more blood to enter the penis, which ultimately results in the penis becoming rigid and erect.

Cyclic GMP is normally broken down by another chemical in the body called phosphodiesterase type 5. Sildenafil works by preventing the action of phosphodiesterase type 5, thus stopping the breakdown of cyclic GMP. This means that the blood vessels are kept dilated for longer, improving blood flow to the penis and maintaining an erection.

As sildenafil enhances the actions of the chemical messengers responsible for producing an erection, it will only work once these messengers are present. This means that sexual stimulation is required for it to produce and maintain an erection. The dose should be taken approximately one hour before intended intercourse.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
•anatomical deformity of the penis, including a rare inherited eye disease called retinitis pigmentosa
•an unusual or allergic reaction to sildenafil, other medicines, foods, dyes, or other heart problems
•high cholesterol
•kidney disease
•liver disease
•sickle cell disease
•stomach or intestinal ulcer
•stroke
•eye or vision problems, a history of heart attack, high or low blood pressure, angina

Sildenafil side effects

If you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw during sexual activity, stop and call your doctor right away. You could be having a serious side effect of sildenafil. Stop using sildenafil and get emergency medical help if you have sudden vision loss. Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using sildenafil and call your doctor at once if you have any of these serious side effects:

• penis erection that is painful or lasts 4 hours or longer.
• feeling light-headed, fainting; or
• vision changes;
• shortness of breath;
• swelling in your hands, ankles, or feet;
• irregular heartbeat;
• chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

Continue taking sildenafil and talk with your doctor if you have any of these less serious side effects:

• back pain.
• upset stomach; or
• headache;
• stuffy nose;
• warmth or redness in your face, neck, or chest;

Overdosage

No overdose of Viagra (Cialis) has been reported. However, any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately.

Side effects

Medicines and their possible side effects can affect individual people in different ways. The following are some of the side effects that are known to be associated with this medicine. Because a side effect is stated here, it does not mean that all people using this medicine will experience that or any side effect.

• Sudden loss of brain function with full recovery within 24 hours (transient ischaemic attack)
  
  
• Bleeding into the tissue of the brain (cerebrovascular haemorrhage)
  
  
• Chest pain (angina pectoris)
  
  
• Persistent painful erection of the penis (priapism)
  
  
• Rash
  
  
• Nosebleeds
  
  
• Fainting
  
  
• High blood pressure (hypertension)
  
  
• Low blood pressure (hypotension)
  
  
• Abnormal heart beats (arrhythmias)
  
  
• Red eyes
  
  
• Eye pain
  
  
• Indigestion
  
  
• Awareness of your heart beat (palpitations)
  
  
• Nasal congestion
  
  
• Visual disturbances, such as blurred vision, blue tinge to vision
  
  
• Dizziness
  
  
• Flushing
  
  
• Headache
  
  

The side effects listed above may not include all of the side effects reported by the drug's manufacturer.

For more information about any other possible risks associated with this medicine, please read the information provided with the medicine or consult your doctor or pharmacist.

What should I watch for while taking sildenafil?

If you notice any changes in your vision while taking this drug, notify your prescriber or health care professional as soon as possible. Stop using sildenafil right away if you have a loss of sight in one or both eyes. Contact your healthcare provider immediately.

Contact you physician immediately if the erection lasts longer than 4 hours or if it becomes painful. This may be a sign of priapism and must be treated immediately to prevent permanent damage.

If you experience symptoms of nausea, dizziness, chest pain or arm pain upon initiation of sexual activity after sildenafil use, you should refrain from further activity and should discuss the episode with your prescriber or health care professional as soon as possible.
Do not change the dose of your medication. Please call your prescriber or health care professional to determine if your dose needs to be reevaluated.

Using Viagra® (sildenafil) does not protect you or your partner against HIV infection (the virus that causes AIDS) or other sexually transmitted diseases.