Your doctor may suggest you try the combination therapy of T3/T4 medicine if T4 medicine is not controlling your symptoms. If your dose of thyroid hormone is too high, you may develop complications such as irregular heartbeats and, over time, osteoporosis. If you have heart disease, too much medicine can cause pain (angina) and irregular heartbeats. Your doctor will watch your thyroid levels using a thyroid-stimulating hormone (TSH) test.
Metric System: The metric system is an internationally agreed decimal system of measurement created in France in 1799. The International System of Units (SI), the official system of measurement in almost every country in the world, is based upon the metric system. In the metric system, each basic type of measurement (length, weight, capacity) has one basic unit of measure (meter, gram, liter).
Refusing to give an inch America's only metric road. Story by Moni Basu, CNN. Video by Nick Scott, CNN. Only three nations do not use the metric system today: Myanmar, Liberia and the United States. But calling America a nonmetric nation is somewhat of a misnomer. The United States has given more than an inch even though it might not have gone the whole nine yards. Consider that Coke bottles are sold in liters. So is wine. Medicine, in milligrams.