RxSideEffect.org: The effects of drugs vary depending upon the drug taken

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Like most prescription medicines, antibiotics can cause side effects. These unwanted effects are often mild, but sometimes they are more serious and can have a major impact on health or quality of life. Most of modern antibiotics are very well tolerated and only rarely cause serious side effects. The effects of drugs can vary depending upon the kind of drug taken, how much is taken, how often it is used, how quickly it gets to the brain, and what other drugs, food, or substances are taken at the same time. Effects can also vary based on the differences in body size, shape, and chemistry. Antibiotic drugs differ in how commonly they cause particular side effects. Medications are prescribed for a specific purpose, and anything else the drug does is a side effect. Some side effects are mild, like a slight headache. Others, like liver damage, can be severe and, in rare cases, fatal. Some go on for just a few days or weeks, but others might continue as long as you take a medication, or even after you stop. Some occur within days or weeks of starting a drug. Others may only show up after months or years of therapy.

Antibiotics are a group of medicines that are used to treat infections caused by germs (bacteria and certain parasites). Antibiotics are normally only prescribed for more serious bacterial infections - for example, pneumonia. When prescribed, it is important to take the entire course of antibiotics which helps to prevent resistance developing to that antibiotic. Most side-effects of antibiotics are not serious - for example, diarrhoea, or mild stomach upset such as feeling sick (nausea). Although some people develop a serious allergy to some antibiotics, this is rare.

In addition to being unable to walk uphill, climb stairs or see clearly, the symptoms may include dry eyes, mouth and skin; ringing in ears; delayed urination; uncontrollable shaking; burning pain in eyes and feet; occasional tingling in hands and feet; heart palpitations. Adverse reactions may occur almost anywhere in the body. In addition to occasional unwanted effects on the musculoskeletal, visual and renal systems, the drugs in rare cases can seriously injure the central nervous system, depression, hallucinations and psychotic reactions, the gastrointestinal system as nausea and diarrhea, hearing and blood sugar metabolism.