Semisynthetic antibiotics tend to be:

• A. They are produced from plants only
• B. They are less stable in the stomach
• C. They are less absorbed
• D. They are more stable in the stomach, easily absorbed, work better

Answer: (D)

Semisynthetic antibiotics are natural antibiotics that are chemically modified to enhance their properties. This typically includes increasing stability in stomach acid, improving oral absorption, and sometimes broadening the spectrum or potency. Because of these changes, they can be taken orally and reach therapeutic levels more reliably, making them more effective overall. They aren’t produced from plants; they’re derived from natural microbial products with deliberate chemical tweaks. They are not inherently less stable or less absorbed, which is why the description of being more stable in the stomach, easily absorbed, and working better best captures what semisynthetic antibiotics aim to achieve.