Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Minocycline (Minocin, Minolira, Solodyn) and sulfamethoxazole/trimethoprim (Bactrim, Septra) are both antibiotics, but they belong to different classes and treat different types of infections. Minocycline is a tetracycline antibiotic that works by stopping bacteria from making certain proteins, which helps treat infections like acne, respiratory infections, and sexually transmitted infections. On the other hand, sulfamethoxazole/trimethoprim is a combination of a sulfonamide and an antifolate that stops bacteria from making folic acid, treating infections such as urinary tract infections (UTIs), ear infections, and lung infections. Minocycline is typically taken once or twice a day, while sulfamethoxazole/trimethoprim is usually taken twice a day. Both medications can make your skin more sensitive to the sun, but minocycline can also cause dizziness and darken your skin and nails. Sulfamethoxazole/trimethoprim can upset your stomach and is not recommended for people with sulfa allergies. Both medications are not recommended during pregnancy due to risks to the unborn baby. Both medications are available as lower-cost generics.
Minocycline
Sulfamethoxazole/trimethoprim
Minocycline
Sulfamethoxazole/trimethoprim
Summary of Minocycline vs. Bactrim
Summary for Tetracycline antibiotic
Prescription only
Minocycline is an antibiotic that treats many types of bacterial infections, including urinary tract infections (UTIs) and sinus infections. It's also used to treat acne when medications that are applied onto the skin aren't working well. Some common side effects include headache, feeling tired, and dizziness. Minocycline can also stain children's teeth and make you more like to get a sunburn.
Summary for Sulfonamide antibiotic
Prescription only
Sulfamethoxazole/trimethoprim (sometimes known as SMZ/TMP) is a combination medication containing an antifolate and sulfa antibiotic. It's used to treat different types of infections, such as urinary tract infections (UTIs), ear infections, and lung infections. This antibiotic has two different brand names, Bactrim and Septra, and it's also available as a lower-cost generic. It's a tablet that's taken by mouth, typically twice daily for most types of infections. This antibiotic also comes as a suspension under the brand name Sulfatrim for people who can't swallow tablets and as an injection for people in the hospital. Common side effects include nausea, diarrhea, and rash.