Women have snubbed erection drug, Viagra, in an attempt to seek longer-lasting erections.
A recent study by New Zealand researchers revealed that an increasing number of women are not satisfied with the results of Viagra, and thus want their men to use anti-impotence medication that lasts longer.
For the study, the researchers road-tested two of the biggest-selling drugs on 100 couples affected by erectile dysfunction.
They found women preferred Cialis, which can help men achieve erections during arousal for 36 hours, over Viagra which works for about four hours.
The couples tested each drug for three months, with 80 per cent of the females concluding they preferred the newer generation drug, tadalafil, branded as Cialis in Australia.
Most participants said that they had a more natural or spontaneous sexual experience on the drug.
"The lack of time pressure with the longer-acting medication just seemed to make the women feel more relaxed and less stressed or pressured to get on with things in bed in an allotted time," the Daily Telegraph quoted University of Waikato researcher Dr Helen Conaglen, who collaborated with her husband, Professor John Conaglen of the University of Auckland, as saying.
"As a result of the slower pace, there was more sexual satisfaction and more intimacy and romance," she added.
Dr Conaglen said that couples responded differently to each drug, with opposing claims about which was best in various ways, like erection quality.
The study, published in the Journal of Sexual Medicine, was partly funded by Cialis manufacturer Eli Lilly.