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There have been rare reports of prolonged erections greater than 4 hours and priapism (painful erections greater than 6 hours in duration) for this class of compounds. Priapism, if not treated promptly, can result in irreversible damage to the erectile tissue. Physicians should advise patients who have an erection lasting greater than 4 hours, whether painful or not, to seek emergency medical attention.In a study to assess the effects of tadalafil on vision, no impairment of colour discrimination (blue/green) was detected using the Farnsworth-Munsell 100-hue test. This finding is consistent with the low affinity of tadalafil for PDE6 compared to PDE5. Across all clinical studies, reports of changes in colour vision were rare (<0.1%).For Erectile Dysfunction "This is a Miracle drug!!!!!!!!!!! Psychological ED for 25 years. I wasn't too bad with my ex wife as I drank to mask anxiety. Nearly 5 years without sex as couldn't get erection with a woman. Always ok in masturbation. Went to see doctor after 25 years silence for Viagra. Was sceptical. Went on first date and took 50mg pill 45 mins before sex. Hot flush in head watery eyes but ok. I had the most amazing sex I couldn't believe it! Full erection straightaway in stimulation. Had full sex twice orgasming both times in half an hour!! I was overwhelmed. A 25 year problem sorted in 45 mins. I'm so confident now. Thank you Viagra I still can't believe it."

si toma otros medicamentos para tratar la hipertensión arterial pulmonar, como riociguat (Adempas).blood pressure is unusually high or low or is not effectively treated using cialis SurgeryPRESCRIBED FOR: Viagra is used for the treatment of erectile dysfunction of either physical or psychogenic cause, and for pulmonary arterial hypertension.sore throat and discomfort when swallowing

Adverse Reaction Placebo viagra substitute over the counter In all four fixed-dose efficacy trials, Levitra showed clinically meaningful and statistically significant improvement in the EF Domain, SEP2, and SEP3 scores compared to placebo. The mean baseline EF Domain score in these trials was 11.8 (scores range from 0-30 where lower scores represent more severe disease). Levitra (5 mg, 10 mg, and 20 mg) was effective in all age categories (<45, 45 to <65, and ≥65 years) and was also effective regardless of race (White, Black, Other).

CIALIS is used to treat:

Contains online cialis So, even if the nerves or blood vessels going to your penis are not working so well, a tablet can cause the blood flow to increase in your penis, and cause an erection. Tablets can treat ED caused by various underlying conditions.For urinary symptoms associated with Benign Prostate Hyperplasia Pfizer won’t say how much money they lose on fake Viagra, but the drug is one of the company’s blockbusters, pulling in more than $2 billion in 2012. Viagra isn’t Pfizer’s only counterfeit headache: in 2008, according to John Clark, vice president of global security for the company, about 20 different Pfizer medicines and products were being counterfeited around the world. Today, that number is up to 60—everything from Lipitor and Centrum Vitamins to, bizarrely, ChapStick.

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