An adverse effect is an undesired harmful effect resulting from a medication or other intervention, such as surgery. An adverse effect may be termed a "side effect", when judged to be secondary to a main or therapeutic effect. … See more

In terms of drugs, adverse events may be defined as: "Any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product and which does not necessarily have to have a causal relationship with … See more

Medical procedures
Surgery may have a number of undesirable or harmful effects, such as infection See more

• Adverse drug reaction
• Biosafety
• Classification of Pharmaco-Therapeutic Referrals
• Consultant pharmacist
• Drug interaction See more

In many countries, adverse effects are required by law to be reported, researched in clinical trials and included into the patient information accompanying medical devices and drugs for sale to the public. Investigators in human clinical trials are obligated to report … See more

Sometimes, putative medical adverse effects are regarded as controversial and generate heated discussions in society and lawsuits against drug manufacturers. One example is the … See more

• Patient Safety Network – includes a glossary and articles on adverse effects, drug reactions, medical error, iatrogenesis, among others.
• Australian Adverse Drug Reactions Bulletin – published bimonthly
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