Minocycline (Minocin, Minolira, Solodyn, Ximino) and tinidazole (Tindamax) are both antibiotics, but they treat different types of infections and belong to different drug classes. Minocycline is a tetracycline antibiotic used to treat bacterial infections like acne, respiratory infections, and sexually transmitted infections (STIs). It works by stopping bacteria from making proteins, which prevents them from multiplying. On the other hand, tinidazole is a nitroimidazole antibiotic that treats bacterial and parasitic infections such as bacterial vaginosis and trichomoniasis. It kills bacteria and parasites by damaging their genetic material. Minocycline can make you more sensitive to the sun and can stain children's teeth, while tinidazole can cause a metallic taste in your mouth and should not be taken with alcohol. Minocycline is available in both generic and brand forms, whereas tinidazole is available as a lower-cost generic. Additionally, minocycline is not recommended during pregnancy, while tinidazole should be avoided during breastfeeding and for 3 days after the last dose.