Antibiotics are the acidic waste product of fermentation and are also subset of antimicrobial agents that are normally produced by the biosynthetic processes of yeast or mold and bacteria and some sugar which enhances fermentation to produce acidic antibiotics as bi-product.
Although antibiotics are in general, considered safe and well-tolerated, they have been associated with a wide range of adverse (side) effect on human health which are many and varied and can be serious
depending on the antibiotics used and the microbial organism targeted. Adverse effect can range from fever and nausea, diarrhea, fungal infections of the mouth (tendon damage) digestive tract and vagina, headache, cramp, vomiting, and stomach discomfort.
Rare but more serious effects include formation of kidney stones, abnormal blood clothing, increased sensitivity of the sun, blood disorder, deafness (hearing loss). Antibiotics can also destroy the beneficial flora (needed for digestion and protection against infections) in the gut.
The questioning of the role of antibiotics as a cause of cancer: since they lead to pathogen overgrowth especially in the area of yeast and fungi, researchers found that the area of all forms of antibiotics for more than 500 days, has a double chance of developing breast cancer compared with women who has not taken any antibiotics, that is to say the fewer the days of antibiotics, the lower the risk.
The very best way to avoid this adverse effect is to discontinue the usage of such antibiotic when adverse effect is noticed while the patient consults a physician.