Identification

• According to MedicineNet.com, an adverse reaction is any unexpected or dangerous reaction to a drug. All drugs have some side effects, but an adverse reaction can happen suddenly and can be serious.
  
  

Causes

• One cause of adverse drug reactions is combining medications that are not compatible. This can result in a serious drug interaction, that can have life-threatening consequences. Always tell your doctor which medications you are taking, to avoid any possible drug interactions. This includes over-the-counter medications, prescription medications and herbal remedies.
  
  

Drug Allergies

• An allergic reaction to the medication you are taking may cause hives, difficulty breathing, swelling of the lips and tongue and wheezing. This is a life-threatening reaction, and you should contact your doctor or emergency medical service immediately if any of these symptoms occur after taking your medication. Be sure to tell your doctor of any allergic reactions to medication you have had in the past.
  
  

Effects

• Many medications have adverse side effects if you expose yourself to sunlight. This is called photosensitivity and can occur with some medications like antibiotics. This condition may result in a sunburn like rash and can be uncomfortable. Be sure to check the information from the pharmacist before taking your medication to avoid potential side effects.
  
  

Prevention/Solution

• When taking any medication, be sure to stick to the correct dosage. Failure to to so may result in dangerous drug interactions or liver damage. If you have any adverse reactions to the medicine that has been prescribed for you, be sure to call your doctor.