NSAID

• Previcox is a non-steroidal, anti-inflammatory drug, first manufactured by the Merial company in 2005. Previcox is a prescription-only medication.
  
  

How Previcox Works

• Previcox inhibits the COX-2 enzyme, which "generates chemicals that are responsible for pain, inflammation and fever," according to 1800Petmeds.com.
  
  

Form and Dosage

• Previcox is available in chewable tablets that should be given to the dog once a day, with or without food. If an overdose occurs, the dog can become nauseous and lethargic, and may have difficulty breathing.
  
  

Drug Interactions

• Previcox can have adverse reactions if given in conjunction with other NSAIDs, steroids, cough or allergy medications.
  
  

Previcox Side Effects

• Previcox can cause abdominal pain, tarry stools, blood in vomit, lethargy, skin rash and possible allergic reactions, such as difficulty breathing, swelling of the face and hives.