Stomach flu or gastroenteritis infection signs and symptoms include nausea, vomiting, and diarrhea that lasts for about 7-14 days. The stomach flu is spread from person to person, usually via fecal to oral route from poor hand-washing or hygiene techniques.
Location: Egypt. Posts: 1,672. Re: How long for meds to take effect. It takes from 1 to 2 days in order for your high bp meds to work, but it reach its maximum effect in 1 week and some times it takes 2 weeks. They said that but I think it's only a week, not more than that.
The emergency contraceptive pill (Levonelle), also know as the morning-after pill, can work up to 72 hours (three days) from when you had unprotected sex. However, the pill is much more likely to work if you take it within 24 hours (Cole 2011) .