PTCB Study Guide: Frequency of Dosage

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Also known as "Sig Codes", Prescription abbreviations are basically coded instructions from a health-care professional. The code is used to supply the words while Roman Numerals are sometimes used for the numbers. These should be memorized to prepare for the PTCB or ExCPT exams.

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<table style="width: 100%;"><tbody>
<tr>
    <td colspan="2">Frequency of Dosage</td> 
  </tr>
<tr>
    <td>q</td>
    <td>Every</td>  
  </tr>
<tr>
    <td>qH</td>
    <td>Every Hour</td>  
  </tr>
<tr>
    <td>qAM</td>
    <td>Every Morning</td>  
  </tr>
<tr>
    <td>qPM</td>
    <td>Every Night</td>  
  </tr>
<tr>
    <td>qHs</td>
    <td>Every Bedtime</td>  
  </tr>
<tr>
    <td>qD</td>
    <td>Everyday</td>  
  </tr>
<tr>
    <td>qOD</td>
    <td>Every Other Day</td>  
  </tr>
<tr>
    <td>qWK</td>
    <td>Every Week</td>  
  </tr>
<tr>
    <td>qMO</td>
    <td>Every Month</td>  
  </tr>
<tr>
    <td>q__o</td>
    <td>(Q) 1°, 2°, 3°, 4°, (Every 4 Hours)</td>  
  </tr>
<tr>
    <td>q__H</td>
    <td>Every__Hour (Every 4 Hours)</td>  
  </tr>
<tr>
    <td>BID</td>
    <td>Twice a day</td>  
  </tr>
<tr>
    <td>TID</td>
    <td>Three times a day</td>  
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<tr>
    <td>QID</td>
    <td>Four times a day</td>  
  </tr>
<tr>
    <td>X_D</td>
    <td>Times_Day (3x a day) </td>  
  </tr>
<tr>
    <td>C</td>
    <td>With</td>  
  </tr>
<tr>
    <td>AC</td>
    <td>Before Meal</td>  
  </tr>
<tr>
    <td>PC</td>
    <td>After Meal</td>  
  </tr>
<tr>
    <td>HS</td>
    <td>At Bedtime</td>  
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    <td>PRN</td>
    <td>As Needed</td>  
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    <td>UD</td>
    <td>As Directed</td>  
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<tr>
    <td>AA</td>
    <td>Of Each</td>  
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<tr>
    <td>QS</td>
    <td>Quantity Sufficient </td>  
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<tr>
    <td>ATC</td>
    <td>Around the clock</td>  
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<tr>
    <td>ad lib.</td>
    <td>as desired</td>  
  </tr>
<tr>
    <td>STAT</td>
    <td>Immediately</td>  
  </tr>
<tr>
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</td>
    <td>Half Strength</td>  
  </tr>
</tbody></table>

Frequency of Dosage Abbreviations

Also known as "Sig Codes", Prescription abbreviations are basically coded instructions from a health-care professional. The code...