Why are there different companies selling different antibiotics?

Quality and efficacy:
- Different companies may produce antibiotics with varying levels of quality and efficacy. Some companies may invest more in research and development to create more effective antibiotics compared to others.

Patents and exclusivity:
- Companies may hold patents on specific antibiotics, giving them exclusive rights to produce and sell those drugs for a certain period. This exclusivity allows companies to recoup their investment in developing the antibiotic.

Market competition:
- Competition in the pharmaceutical market drives companies to develop new antibiotics or improve existing ones to gain a competitive edge. This competition can lead to the availability of multiple antibiotics with similar functions but different marketing strategies.

Formulations and delivery methods:
- Companies may develop different formulations or delivery methods for antibiotics to cater to specific patient needs or preferences. For example, some antibiotics may be available in pill form, while others may be administered through injections.

Global regulations and approvals:
- Different countries have varying regulatory requirements for the approval and sale of antibiotics. Companies may need to navigate these regulations to introduce their antibiotics to different markets, leading to a diverse range of antibiotics being available.

Market segmentation:
- Companies may target different segments of the market with their antibiotics based on factors such as price, brand reputation, or specific indications. This segmentation can result in a variety of antibiotics being offered by different companies.