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.
Heat pump prices and heat pump estimates. When entering the market for a heat pump, know that there are two general types of heat pumps available for you: air source heat pumps and geothermal heat pumps. Costs for an air source heat pump usually range from $1,500 to $7,500 for the purchase and installation.