What drug is commonly known as Bactrim?

Bactrim is commonly known as Trimethoprim-Sulfamethoxazole, which is a combination antibiotic that works synergistically to target bacterial infections. This combination is effective against a variety of infections, including urinary tract infections, respiratory infections, and certain types of gastrointestinal infections.

Trimethoprim and Sulfamethoxazole each inhibit different steps in the bacterial folate synthesis pathway, leading to a stronger antibacterial effect when used together than either drug alone. This synergy is particularly useful in clinical settings where resistance may occur if only one drug is used.

The other options do not represent the same medication. Silver sulfadiazine is primarily used for burn treatment, sulfasalazine is an anti-inflammatory used mainly in ulcerative colitis and rheumatoid arthritis, and isoniazid is an antitubercular drug specifically used for the treatment of tuberculosis. Each of these drugs serves very different purposes in medical practice compared to Trimethoprim-Sulfamethoxazole.