This phenomenon is known as gravity. More massive objects have a stronger pull than less massive objects. This is why you weigh more on larger, more massive planets like Jupiter and less on smaller, less massive planets like Mars. The mass of an object depends not only on its size, but also its composition.
Nifedipine is approved to control high blood pressure and angina (chest pain). Classified as a calcium-channel blocker, nifedipine blocks the passage of calcium into cardiac and smooth muscle, like those of the uterus. And calcium is needed for the uterus to contract. Nifedipine is one of the most widely used and studied medications among the calcium-channel blockers to suppress preterm contractions. But the use of tocolytics is controversial. In 80 percent of women with suspected preterm labor, early delivery will not occur.
Nifedipine 20 mg sublingual, repeated after 30 minutes if contractions do not decrease in intensity. Maintenance of 120-160 mgs of slow-release nifedipine daily for 48 hours.Once contractions cease, nifedipine will be maintained at 80-120 mg daily in divided doses up to 36 weeks. Nifedipine 10 mg sublingual crushed, then 10 mg in 15 min, followed by 10 mg PO Q 15 mins PRN to a maximum of 40 mg in the first hour. Maintenance of 60-80 mgs of slow-release nifedipine daily for 48 hours. Once contractions cease, nifedipine will be maintained at 60 mg daily in divided doses up to 36 weeks.