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.
A Stacy Wiegman, PharmD , Pharmacy, answered. Labetalol should work fairly quickly. Injected labetalol can lower blood pressure in a few minutes; labetalol in tablet form should take only a little longer. If you have been taking labetalol and no longer notice the symptoms of hypertension, do not stop taking the drug, even if symptoms do not reappear immediately.