Before entering information into the search box, it is a good idea to formulate your search topic in a logical manner. One way to do this is to state your information need in the form of a question or a statement, e.g. How effective is heparin in reducing complications from heart attacks in patients over 65 years of age?
Break your question into individual parts: heart attack, heparin, age over 65.
Perform a search on each of the individual topics (leave the age topic until you apply limits).
Combine the topics together; apply limits, if necessary.
Evaluate the results to see if they answer your original question.
There are six different search options in Ovid MEDLINE.
Select the "Include Related Terms" box when using the Basic Search feature to automatically include synonym terms for a more thorough search.
The search information box displays the various terms added to your search when you included related terms.