ALLERGY, RESPIRATORY
Combating Myths About Seasonal Allergies
Climate Change Could Sting Allergy, Asthma Sufferers
Air Pollution May Raise Blood Pressure
ALTERNATIVE MEDICINE
Maggots as Good as Gel in Leg Ulcer Treatments
Animals Respond to Acupuncture's Healing Touch
Eight Spiritual Universal Principles in the Art of Practice
ANIMAL CARE
Rest Easy. When It Comes to Swine Flu, Your Pet Is Safe
Beware of Dog Bites
'Comfort Dogs' Come to Emotional Rescue
BONES & JOINTS
Tai Chi May Help Ease Fibromyalgia
Gene Therapy May Ease Rheumatoid Arthritis
Weight Loss Might Not Curb Knee Arthritis
CANCER
Scams and Shams That Prey on Cancer Patients
Asthmatics Who Quit Smoking May Reverse Lung Damage
Breast Self-Exam Rates Go Up With Counseling
CAREGIVING
Child's Food Allergies Take Toll on Family Plans
Falls Are Top Cause of Injury, Death Among Elderly
Acute Respiratory Distress Syndrome as Deadly as Ever
CIRCULATORY SYSTEM
Common Antioxidant Might Slow Parkinson's
High Blood Fat Levels Common in Americans
Bad Marriages Harder on Women's Health
COSMETIC
Study Evaluates Laser Therapies for Hair Removal
Wrinkle Fillers Need Better Label Warnings: FDA Panel
Get Sugared!.... Its a sweet choice for hair removal
DENTAL, ORAL
Health Tip: At Risk for Gingivitis
Sports Drinks May Be Tough on Teeth
An Oral Approach to Heart Disease
DIABETES
Fructose-Sweetened Drinks Up Metabolic Syndrome Risk
Arthritis Hits More Than Half of Diabetics
Poor Blood Sugar Control After Heart Surgery Impacts Outcomes
DIET, NUTRITION
Many Cancer Survivors Don't Adopt Healthy Lifestyle
Polyunsaturated Fats Really May Lower Heart Risk
Go Healthy, Not Hungry for Holiday Eating
DISABILITIES
Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
ENVIRONMENTAL HEALTH
Chemical in Plastics May Cause Fertility Problems
Genetics, Environment Shape Sexual Behavior
Flame-Retardant Chemical Linked to Conception Problems
EYE CARE, VISION
Clues Found to Brain Mechanism Behind Migraines
Glaucoma Associated With Reading Impairments in Elderly
Blood Sugar Control Helps Diabetics Preserve Sight
FITNESS
As Temperature Plummets, It's Still Safe to Exercise
Exercise Cuts Lung Cancer Risk in Ex-Smokers by 45%
Meditation May Help Put Primary Insomnia to Bed
GASTROINTESTINAL PROBLEMS
HRT Use Raises Risk of Stomach Trouble
Intestinal Bacteria Trigger Immune Response
Olive Oil May Protect Against Bowel Disease
GENERAL HEALTH
Why Am I So Tired? Could It Be Low Thyroid?
Simple Holistic Approach to Fight the Common Cold
Regular Yoga May Improve Eating Habits
HEAD & NECK
Zen May Thicken Brain, Thwart Pain
Ski Helmets Encouraged for All
Many Children Will Outgrow Headaches
HEALTH & TECHNOLOGY
The Internet Is Becoming One-Stop Shopping for Health Help
Magnet Therapy May Ease Hard-to-Treat Depression
Imaging Sheds Light on How Acupuncture Works
HEARING
Summer Sounds Can Lead to Hearing Loss
Noise Hurts Men's Hearing More, Study Shows
HEART & CARDIOVASCULAR
Exercise May Blunt Salt's Effect on Hypertension
Research Shows Genetic Activity of Antioxidants
Cherry-Enriched Diet Cut Heart Risks in Rats
INFECTIOUS DISEASE
The HPV Vaccine: Preventative Medicine or Human Sacrifice?
Poor Restroom Cleaning Causes Cruise-Ship Sickness
Swine Flu Is Now a Pandemic Says W.H.O.
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Health Tip: Back Pain in Children
Music May Temper Pain in Preemies
Many Children Will Outgrow Headaches
MEN'S HEALTH
Could Chinese Herb Be a Natural Viagra?
Vigorous Exercise Cuts Stroke Risk for Men, Not Women
Eating Fast Until Full Triples Overweight Risk
MENTAL HEALTH
A Simple 'Thank You' Brings Rewards to All
Man's Best Friend Helps Mend Broken Hearts
Chocolate a Sweet Pick-Me-Up for the Depressed
PAIN
Are We Exercising Pain Away? Not So Much.
Alleviating Rheumatoid Arthritis
'Cell Phone Elbow' -- A New Ill for the Wired Age
PHYSICAL THERAPY
PREGNANCY
Exercise Boosts Bone Density in Breast-Feeding Moms
Alternative Treatments May Boost IVF Success
Woman in America Are Delaying Motherhood, Study Says
SENIORS
Tai Chi May Help Ward Off Knee Pain in Seniors
Laughter Can Stimulate a Dull Appetite
Tai Chi May Help Ease Fibromyalgia
SEXUAL HEALTH
SLEEP DISORDERS
Better Sleep, Grades Seem to Go Up
Daylight Savings: Not a Bright Time for All
Pay Attention to Signs That Say You're Too Fatigued to Drive
WOMEN'S HEALTH
Spice Compounds May Stem Tumor Growth
Steady Weight Gain Boosts Late-Life Breast Cancer Risk
Soy May Not Lead to Denser Breasts
Add your Article

Impotence Drugs Don't Harm Vision: Study

TUESDAY, April 14 (HealthDay News) -- The erectile dysfunction drugs Cialis (tadalafil) and Viagra (sildenafil) didn't appear to damage vision in men who took the medications daily for six months, according to a drug company study.

These drugs, called selective phodiesterase type 5 (PDE5) inhibitors, treat erectile dysfunction by interfering with the action of the compound PDE5 in the blood vessels of the penis. But there are concerns that PDE5 inhibitors may also act on similar compounds in the retina, the part of the eye that receives and transmits images to the brain, according to background information in the study.

Men taking PDE5 inhibitors have reported mild and temporary blurred vision, altered light perception, and blue-tinged vision.

This Eli Lilly study included 244 men, ages 30 to 65, who were randomly selected to take either 5 milligrams of tadalafil, 50 mg. of sildenafil, or a placebo daily for six months. The men underwent thorough eye tests before, during and after treatment.

By the end of the study, the researchers found no significant differences in vision between the men who took the drugs and those who took the placebo. The findings were published in the April issue of the journal Archives of Ophthalmology.

"There are several reasons ophthalmologists need to be acquainted with the pharmacologic profiles of PDE5 inhibitors and their potential side effects," the authors wrote "The frequency of erectile dysfunction, which is a form of peripheral vascular disease that impairs men's abilities to achieve and maintain an erection, increases dramatically with age and in the presence of cardiovascular risk factors. Therefore, many men who take PDE5 inhibitors to treat their erectile dysfunction will also be followed up by ophthalmologists for ocular disorders such as diabetic retinopathy, macular degeneration and ocular vascular disease."

"Furthermore, PDE5 inhibitors can exert direct effects on the retina, and such effects probably account for many of the visual side effects such as blue-tinged vision and light sensitivity that have been reported," they concluded.

But they said their "results indicate that there is no cumulative damage or effect of clinical significance for either 5 milligrams of tadalafil or 50 milligrams of sildenafil taken daily for six months."

More information

The American Urological Association has more about erectile dysfunction.



-- Robert Preidt



SOURCE: JAMA/Archives journals, news release, April 13, 2009

Last Updated: April 14, 2009

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