Common antibiotics used include amoxicillin, erythromycin, or doxycycline. Antibiotics such as tetracycline or erythromycin may also be prescribed. These include tetracycline, doxycycline, and erythromycin. These include clindamycin, anisomycin, cycloheximide, chloramphenicol, tetracycline, streptomycin, erythromycin, and puromycin. Guidelines recommend azithromycin, doxycycline, erythromycin, levofloxacin or ofloxacin. A macrolide such as azithromycin or erythromycin is used for people allergic to penicillin. Other antibiotics proven to be effective include cotrimoxazole, erythromycin, tetracycline, chloramphenicol, and furazolidone. Its toxicity is increased by erythromycin, cimetidine, and fluoroquinolones, such as ciprofloxacin. Agents recommended during pregnancy include erythromycin or amoxicillin. The antibiotics erythromycin, clarithromycin, or azithromycin are typically the recommended treatment. Some strains are resistant to certain antibiotics, specifically erythromycin and clindamycin. Erythromycin or azithromycin is recommended in babies and during pregnancy. Historically, antibiotics such as tetracyclines and erythromycin were prescribed. It is innately resistant to macrolides (e.g., erythromycin), clindamycin, and metronidazole. In addition, the efficacy of doxycycline and erythromycin succinate may be reduced by alcohol consumption.