Medical Definition of Sulfa drug Sulfa drug: One of the sulfonamides, the sulfa-related antibiotics which are used to treat bacterial and some fungal infections. The first sulfa drug was prontosil. It was discovered by the German physician and chemist Gerhard Domagk in 1935. Sulfa drugs kill bacteria and fungi by interfering with their metabolism. They were the wonder drugs before penicillin and are still used today.
NEXT STEP. Find out how much your project will cost. Provide a few details about your project and receive competitive quotes from local pros. The average national cost to install a geothermal heating or cooling system is $5,745, with most homeowners spending between $3,534 and $11,089.
Installing a heat pump can make a huge difference in your electricity bill by decreasing the cost of heating and cooling your home. A heat pump will replace both the furnace and air conditioner/central air unit. The average cost to install a heat pump ranges from $3,957 and $6,754 depending on the size of your home and type of heat pump. Since a geothermal heat pump requires underground installation, its installation costs will be more expensive than the costs for the air-source type.