There are two known types of atelectasis. The first type is called acute atelectasis which usually results from surgery involving the opening of the chest cavity or the abdominal area. This type of atelectasis may also result from physical trauma to the lungs like during car accidents or stabbing incidents.
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.