Metronidazole tablets may cause some adverse reactions. For example, some people will have dizziness, nausea and vomiting after taking metronidazole tablets. Moreover, long-term use of metronidazole tablets may also cause liver damage and increase the risk of hepatitis or liver cancer. These side effects and risks are one of the factors that doctors consider.
Metronidazole tablets have certain bactericidal effect on bacteria and parasites, but have no effect on viruses. If the patient has symptoms such as fever and cough due to a cold or other viral infection, metronidazole tablets can't cure the viral infection. On the contrary, excessive use of antibiotics may lead to drug resistance, making it ineffective when antibiotics are really needed.
Another reason is that metronidazole tablets are only targeted at specific infections and cannot be widely used in various bacterial infections. When the bacteria infected by patients do not fall within the scope of metronidazole, the use of this drug will not produce therapeutic effects. Metronidazole tablets are not necessarily effective against some drug-resistant bacteria, which makes doctors more inclined to choose other more suitable antibiotics to treat infections.
Although metronidazole tablets have certain antibacterial effect, they are not omnipotent. In some cases, doctors may think that other treatments are more suitable for patients. For example, some minor bacterial infections, the body's immune system can often remove bacteria by itself, and antibiotics are not needed at this time. For example, in some special cases, such as pregnant women or children, doctors may consider using safer treatment programs to avoid potential risks.
Metronidazole tablets are not required in all cases. The doctor will judge according to the specific situation of the patient and choose the most suitable treatment plan. This is one of the reasons why doctors do not recommend taking metronidazole tablets at will. Therefore, when facing infection or needing antibiotic treatment, please be sure to follow the doctor's advice and don't decide to use metronidazole tablets or other drugs by yourself.