The Human Biology in Medical Field

Posts Tagged ‘Viagra’

by clumsy_jim

Article by Cornelius Graham

Stuart Lewis, an ophthalmologist in Denver, Colorado.There is perfectly-documented information and facts about drugs like Viagra, Levitra, and Cialis and the aspect consequences they can cause. These medicine work by inhibiting an enzyme in the human body (PDE-5), and improving the effects of nitric oxide. Nitric oxide is a chemical in the body that stimulates smooth muscle and enhances blood flow, resulting in the wanted consequences.Alas, these prescription drugs can also have an affect on blood flow in arteries in other elements of the human body, creating significant, undesirable facet consequences. For instance, in addition to inhibiting the enzyme PDE-five, Viagra-like prescription drugs can also inhibit the enzyme PDE-6. This other enzyme features in the photoreceptors in the eyes the outcome is light sensitivity or blue-tinged vision.In addition to this vision-linked facet effect Levitra, Cialis, and Viagra can also bring about other facet effects, including:&sect Mausea&sect Facial Flushing&sect Headache&sect Pulmonary Hypertension&sect Nasal Congestion&sect Gastrointestinal ComplicationsThese facet results can have significant professional medical consequences, and they take place in about three% of males who acquire 25 – fifty mg, 50% of adult males who acquire 200 mg, and a staggering a hundred% of men taking 600 – 800 mg of the prescription drugs.In addition to these side consequences, there is also a very uncommon eye disorder that has been noted in various men utilizing Viagra, Levitra, or Cialis, and is now under investigation to decide if there is a website link involving the medication and this badly recognized vision problem.This eye condition is named Non-Arteric Anterior Ischemic Optic Neuropathy (NAION). NAION is the most widespread optic nerve disease that takes place in grownups around the age of fifty. In reaction to the attainable website link in between NAION and treatment like Viagra, Pfizer has said: “Most of the cases in which NAION has occurred in adult men taking Viagra have concerned clients with underlying anatomic or vascular possibility aspects connected with the development of NAION.” In essence, this indicates that relationship concerning Viagra and NAION cannot be established at this time.”The bottom line is, and what I notify all my clients, is that these treatment must by no means be taken except if they are wanted simply because there are critical wellness and visual hazards involved with them,” says Dr. Lewis.If you are considering taking Viagra, Levitra, or Cialis, it is significant that you look at with your ophthalmologist prior to taking any of the drugs if you experience from:&sect Diabetes&sect Retinitis Pigmentosa&sect Retinal Pthology (Macular Degeneration or other Optic Nerve Problems)Typically, what we recognize when we 1st listen to about Cialis is the fact that this is the first genuine competitor of Viagra as it fights towards erectile disfunction as very well as the first described. Viagra appeared in 1998 and registered a substantial results usually for the truth that it was the initially product or service of this variety. These days a new effective item was attributed to ICOS corporation which is to shatter the unbelievable good results of Viagra. The series is not ending here, anyway,as one more one identified as Levitra is expected to seem.Initial of all, there should be stated that the sell current market of Cialis has attained an massive level which is bound to place aside the good results registered by Viagra in the late 90′s.

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Article by Wilbert Walls

These side effects can have serious medical consequences, and they occur in about 3% of men who take 25 – 50 mg, 50% of men who take 200 mg, and a staggering 100% of men taking 600 – 800 mg of the drugs.In addition to these side effects, there is also a very rare eye disorder that has been reported in several men using Viagra, Levitra, or Cialis, and is now under investigation to determine if there is a link between the medication and this poorly understood vision problem.This eye disorder is called Non-Arteric Anterior Ischemic Optic Neuropathy (NAION). NAION is the most common optic nerve disease that occurs in adults over the age of 50. In response to the possible link between NAION and medication like Viagra, Pfizer has stated: “Most of the cases in which NAION has occurred in men taking Viagra have involved patients with underlying anatomic or vascular risk factors associated with the development of NAION.” Essentially, this means that relationship between Viagra and NAION cannot be determined at this time.”The bottom line is, and what I tell all my patients, is that these medication should never be taken unless they are needed because there are serious health and visual risks associated with them,” says Dr. Lewis.If you are considering taking Viagra, Levitra, or Cialis, it is important that you check with your ophthalmologist before taking any of the drugs if you suffer from:§ Diabetes§ Retinitis Pigmentosa§ Retinal Pthology (Macular Degeneration or other Optic Nerve Disorders)VIAGRAWhat is Viagra?Viagra is an anti-impotence drug manufactured by Pfizer with an active ingredient sildenafile citrate for treatment of male impotence. Sildenafile citrate relaxes the muscles and increases the blood flow to particular areas of the body. The intake of Viagra increases the ability to achieve and sustain erection on being sexually stimulated. Men taking Viagra have reported an amplified sex drive, increased stamina, and quicker recharge. Viagra works together with sexual stimulation to help achieve maximum sexual satisfaction. However, Viagra does not guarantee protection from getting sexually transmitted diseases, including HIV and Hepatitis.How Viagra works?Viagra enables many men with ED to respond to sexual stimulation. When a man is sexually aroused, the arteries in the penis relax and widen, allowing more blood to flow into the penis. As the arteries in the penis expand and harden, the veins that normally carry blood away from the penis become compressed, restricting the blood flow out of the penis. With more blood flowing in and less flowing out, the penis enlarges, resulting in an erection. It is to be noted that Viagra is not a hormone or aphrodisiac, it works only when a man is sexually stimulated.Viagra DosageViagra is available in the form of tablet and is meant to be taken orally. Ideally it is to be taken almost an hour before the sexual activity. However, Viagra can be taken anytime from 4 hours to 30 minutes before sexual activity. It takes 30 – 45 minutes for showing Viagra’s effect and this effect lasts for almost four hours. If you take Viagra after a high-fat meal (such as fish & chips, cheeseburger or French fries), it may take a little longer to start working. Viagra should not be taken more than once a day unless prescribed by your doctor.

Incoming search terms:

• herbal viagra and eyes
• non arteric anterior ischemic optic neuropathy without increase pressure post operatively cataract surgery

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Article by J. Bradley

What is Viagra?

Viagra is a prescription medicine taken by mouth for the treatment of erectile dysfunction (ED) in men. ED is a condition where the penis does not harden and expand when a man is sexually excited, or when he cannot keep an erection. Viagra may help a man with ED get and keep an erection when he is sexually excited. Viagra must be used only under a doctor’s care.

Viagra does not:

cure ED

increase a man’s sexual desire

protect a man or his partner from sexually transmitted diseases, including HIV. Speak to your healthcare professional about ways to guard against sexually transmitted diseases.

serve as a male form of birth control

Viagra is only for men with ED. Viagra is not for women or children. Viagra must be used only under a healthcare professional’s care.

Who Should Not Take Viagra?

Do not take Viagra if you:

take any medicines called “nitrates”

use recreational drugs called “poppers” like amyl nitrate and butyl nitrate

have been told by your healthcare professional to not have sexual activity because of health problems

What are The Risks?

The following are the major possible risks and side effects of Viagra therapy. This list is not complete.

Viagra can cause your blood pressure to drop suddenly to an unsafe level if it is taken with certain other medicines such as nitrates and alpha-blockers, and recreational drugs that contain nitrates called “poppers.” A sudden drop in your blood pressure could cause you to become dizzy, faint, or have a heart attack or stroke.

Tell all your healthcare professionals that you take Viagra. If you need emergency medical care for a heart problem, it will be important for your healthcare professionals to know when you last took Viagra.

Viagra may uncommonly cause:

an erection that won’t go away (priapism)

vision changes, such as seeing a blue tinge to objects or having difficulty telling the difference between the colors blue and green

Some common side effects with Viagra include:

headache

flushing

upset stomach

stuffy or runny nose

urinary tract infection

diarrhea

What Should I Tell My Healthcare Professional?

Tell your healthcare professional if you:

have or had heart problems

have low blood pressure or have high blood pressure that is not controlled

have had a stroke

have liver problems

have ever had severe vision loss

have kidney problems or require dialysis

have retinitis pigmentosa, a rare genetic (runs in families) eye disease

have stomach ulcers

have a bleeding problem

have a deformed penis shape or Peyronie’s disease

have had an erection that lasted more than 4 hours

have blood cell problems such as sickle cell anemia, multiple myeloma, or leukemia

are taking a medicine called a protease inhibitor for the treatment of HIV

are taking medicines called alpha blockers (alpha blockers are sometimes prescribed for prostate problems or high blood pressure)

Can Other Medicines or Food Affect Viagra?

Viagra and certain other medicines can interact with each other. Tell your healthcare professional about all the medicines you take including prescription and non-prescription medicines, vitamins, and herbal supplements. Know the medicines you take. Keep a list of them with you to show your healthcare professional.

Viagra FDA Approved 1998Patient Information Sheet Revised 07/2005Source: http://www.fda.gov

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Article by M. Tony Jones

Before consulting with a Viagra doctor either online or locally, it is wise to educate yourself about the drug so as to know what to ask and how to answer.

In view of the serious side effects of Viagra for heart patients, your Viagra doctor will likely be very cautious if you suffer from any heart condition.

Here is a safety checklist you can use before you have a consultation with your Viagra doctor and also a monitoring checklist if you need to provide him with feedback regarding side effects:

What You Should Know About Viagra Before The Consultation With A Viagra Doctor

Viagra is for men only to help combat impotence (also called erectile dysfunction)

Viagra does not in itself produce an erection. It does produce an erection when a man is sexually stimulated.

Viagra should be taken about 1 hour before anticipated sexual activity or a little longer if taken after a high fat meal.

Viagra comes in various doses, 25, 50, or 100 mg so your Viagra doctor may choose a lower dosage if you have other health related complications.

The most common side effects of Viagra are upset tummy, headaches, runny nose, facial flushes, and urinary tract infections.

Make sure your Viagra doctor knows you are taking any medication with a nitrate base as these can have a serious and potentially dangerous effect on blood pressure when used with Viagra.

Be sure to tell your Viagra doctor if you have had:

heart problemsa strokelow or high blood pressurestomach ulcersbleeding problemsickle cell anemia, multiple myeloma, or leukemiakidney problems or require dialysisliver problemssevere vision lossretinitis pigmentosa eye diseasea deformed penis shape or Peyronie’s diseasean erection that lasted more than 4 hours

Also inform your Viagra doctor if you are taking the following types of medication:

protease inhibitors for the treatment of HIValpha blockers (often used for prostate or high blood pressure problems)

Be Aware

Viagra is not for normal use. It should only be taken before sexual activity. In the event a mistake is made and an overdose is taken, be sure to inform your Viagra doctor immediately.

Viagra has been on the market with FDA approval since 1998. In the years since well documented evidence shows it can have a significant effect on helping men overcome erectile dysfunction.

However, while Viagra is generally quite safe for the majority of men who use it, for individuals with other ailments, especially heart related problems, a thorough consultation with a Viagra doctor is necessary to avoid potential life threatening consequences.

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Article by Bianca Casey

VIAGRA [Sildenafil citrate] is the only approved and effective oral agent for the treatment of erectile dysfunction. Before that a few lines on erectile dysfunction.Erectile dysfunction [Impotence] is a condition in which erection the penis cannot be achieved during sexual intercourse/masturbation. There are many causes for erectile dysfunction. The most common cause of being increasing age. Other conditions can be: – Diabetes Mellitus – Hypertension – Heart Disease – Atherosclerosis – Lower spinal cord injury – Cancer prostate – Psychogenic – StressErection is achieved when there is increased blood flow to penis and hence the main organic cause is disturbance of blood flow to and from the penis.Coming back to VIAGRA [Sildenafil citrate], Viagra is a selective and potent inhibitor of cyclic guanosine monophosphate [cGMP] specific phosphodiesterase type 5 inhibitor [PDE5] which is the predominant phosphodiesterase isoform found in the penis. It is administered in doses of 25, 50 and 100 mg, and enhances erection after sexual stimulation. The onset of action is around 60-90 mins.Sildenafil (compound UK-92,480) was synthesized by a group of chemists working at Pfizer’s Sandwich, Kent research facility in England. It was initially studied for use in hypertension and angina pectoris. The first clinical trials were conducted in Morriston Hospital in Swansea. Phase I clinical trials under the direction of Ian Osterloh suggested that the drug had little effect on angina, but that it could induce marked penile erections. VIAGRA [Sildenafil citrate] was approved for use in erectile dysfunction by the Food and Drug Administration on March 27, 1998, becoming the first pill approved to treat erectile dysfunction Reduced initial doses should be considered for patients, who are elderly, have renal insufficiency, or are taking medications that inhibit the CYP3A4 metabolic pathway in the liver [e.g., erythromycin, cimetidine, ketoconazole] as they may increase the serum concentration of sildenafil. The drug does not affect ejaculation, orgasm or sexual drive. When sexual stimulation causes local release of NO, inhibition of PDE5 by VIAGRA [Sildenafil citrate] causes increased levels of cGMP in the corpus cavernosum of the penis resulting in smooth muscle relaxation and inflow of blood to the corpus cavernosum. Side Effects:• Headaches• Facial flushing• ringing in ears, or sudden hearing loss• Dyspepsia• Nasal congestion.• Abnormal vision [blue halo effect]• Diarrhea• Dizziness• Rashes – Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision lossSpecial precautions: In patients with• Bleeding disorders such as hemophilia• Liver disorder• Kidney disorder• Active peptic ulcerations and • Anatomical deformation of the penis, such as peyronie’s disease.• Retinitis pigmentosaContraindications: VIAGRA [Sildenafil citrate], is contraindicated in men receiving nitrate therapy for cardiovascular disease, including agents delivered by oral, sublingual, trans-nasal or topical routes. These agents can potentates its hypotensive effect and may result in profound shock. Viagra should be avoided in patients with congestive heart failure and cardiomyopathy because of the risk of vascular collapse.Other brands are: – Caverta: Ranbaxy – Alisgra: Alembic – Euthansia: Lupin Remedies – Juan: Cadilla- Silagra: Cipla

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Article by Joeseph Phillips

It’s very important that a physician knows your medical history before dispensing Viagra or any other medication to you. A reputable online pharmacy will allow you to consult with their on staff physician before receiving your Viagra. You will have to fill out complete medical history so the doctor is aware if you have any conditions such as high blood pressure, kidney disease, liver disorders, sickle cell anemia, multiple myeloma, and leukemia, anatomical deformations of the penis, bleeding deficiencies, or retinitis pigmentosa. All of this information must be included on your consultation form that the doctor will study prior to giving you a prescription of Viagra.

There are certain medications that will disqualify you from being a Viagra candidate too. Anyone that is taking medications that contain nitrates should absolutely NOT take Viagra. The doctor should know about ALL medications that you are taking, both prescription and non prescription. Other medications that could affect you’re taking Viagra include cimetidine, erythromycin, clarithromycin, verapamil, azole antifungals (e.g. itraconazole, ketoconazole, quinidine, quinine, fluconazole), mibefradil, medication for HIV infection, niacin, omeprazole, rifamycins (e.g. rifampin), or high blood pressure medicines.

It is very important to discuss your health with the doctor so that he can determine if you are a healthy candidate for not only Viagra but also if you are healthy enough to engage in sexual activity. If you are older than age 65, or have serious liver or kidney problems, your doctor may start you at the lowest dose (25 mg) of Viagra. If you don’t already have a Viagra prescription, the online pharmacy will usually provide one for you. They do this by having you fill out a detailed medical questionnaire to guarantee it’s safe for you to take Viagra. It’s important to fill out this information fully and accurately. Usually there is a charge for this service, but only if you are approved for the prescription. If you aren’t, there’s no charge. So be honest on the online pharmacy medical questionnaire, your health depends on it.

Viamedic has been one of the leading online pharmacies since 1998, offering safe FDA-Approved online prescriptions, at the lowest prices available on the internet. Order Viagra safley and conveniently at Viamedic, which can garner an array of benefits associated with buying prescription medicines online. Visit their compare Viagra, Cialis, and Levitra chart at Viamedic.com to learn more about the difference between the three products.

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Article by jamie

VIAGRA [Sildenafil citrate] is the only approved and effective oral agent for the treatment of erectile dysfunction. Before that a few lines on erectile dysfunction.Erectile dysfunction [Impotence] is a condition in which erection the penis cannot be achieved during sexual intercourse/masturbation. There are many causes for erectile dysfunction. The most common cause of being increasing age. Other conditions can be: – Diabetes Mellitus – Hypertension – Heart Disease – Atherosclerosis – Lower spinal cord injury – Cancer prostate – Psychogenic – StressErection is achieved when there is increased blood flow to penis and hence the main organic cause is disturbance of blood flow to and from the penis.Coming back to VIAGRA [Sildenafil citrate], Viagra is a selective and potent inhibitor of cyclic guanosine monophosphate [cGMP] specific phosphodiesterase type 5 inhibitor [PDE5] which is the predominant phosphodiesterase isoform found in the penis. It is administered in doses of 25, 50 and 100 mg, and enhances erection after sexual stimulation. The onset of action is around 60-90 mins.Sildenafil (compound UK-92,480) was synthesized by a group of chemists working at Pfizer’s Sandwich, Kent research facility in England. It was initially studied for use in hypertension and angina pectoris. The first clinical trials were conducted in Morriston Hospital in Swansea. Phase I clinical trials under the direction of Ian Osterloh suggested that the drug had little effect on angina, but that it could induce marked penile erections. VIAGRA [Sildenafil citrate] was approved for use in erectile dysfunction by the Food and Drug Administration on March 27, 1998, becoming the first pill approved to treat erectile dysfunction Reduced initial doses should be considered for patients, who are elderly, have renal insufficiency, or are taking medications that inhibit the CYP3A4 metabolic pathway in the liver [e.g., erythromycin, cimetidine, ketoconazole] as they may increase the serum concentration of sildenafil. The drug does not affect ejaculation, orgasm or sexual drive. When sexual stimulation causes local release of NO, inhibition of PDE5 by VIAGRA [Sildenafil citrate] causes increased levels of cGMP in the corpus cavernosum of the penis resulting in smooth muscle relaxation and inflow of blood to the corpus cavernosum. Side Effects:• Headaches• Facial flushing• ringing in ears, or sudden hearing loss• Dyspepsia• Nasal congestion.• Abnormal vision [blue halo effect]• Diarrhea• Dizziness• Rashes Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss:-Special precautions: In patients with• Bleeding disorders such as hemophilia• Liver disorder• Kidney disorder• Active peptic ulcerations and • Anatomical deformation of the penis, such as peyronie’s disease.• Retinitis pigmentosaContraindications: VIAGRA [Sildenafil citrate], is contraindicated in men receiving nitrate therapy for cardiovascular disease, including agents delivered by oral, sublingual, trans-nasal or topical routes. These agents can potentates its hypotensive effect and may result in profound shock. Viagra should be avoided in patients with congestive heart failure and cardiomyopathy because of the risk of vascular collapse.

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Article by Jwesly

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Article by Kelly Purden

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Article by Anthony Delar