Medical Abbreviations
Decode common medical prescription terms
Frequently Asked Questions
What does 'OD' mean on a prescription?
'OD' stands for 'Omni Die', which means 'Once a Day' in medical terminology.
What is the difference between 'AC' and 'PC'?
'AC' means 'Before Meals' (Ante Cibum), and 'PC' means 'After Meals' (Post Cibum). Tracking this is critical for drug effectiveness.
How many times is 'TID' or 'TDS'?
Both mean 'Three Times a Day'. Usually taken Morning, Afternoon, and Night.
What does 'SOS' mean?
'SOS' (Si Opus Sit) indicates that the medicine should be taken 'only when needed' (e.g., for pain or fever).
What is 'STAT' on a medical order?
'STAT' means the dose must be given 'immediately' or 'at once'.
Are these abbreviations standard globally?
Yes, most are based on Latin terms and are used by doctors worldwide, including in India.
Why do doctors use abbreviations instead of plain English?
It's a historical standard to save time and provide consistent, shorthand instructions to pharmacists.
What does 'HS' or 'BT' mean?
Both indicate the medicine should be taken 'at bedtime' (Hora Somni).
How do I read liquid dosages like '5ml' or '1 tsp'?
One teaspoon (tsp) is typically 5ml. Always use the measuring cup provided with the syrup for accuracy.
Does 'QID' mean twice or four times?
'QID' means four times a day. Do not confuse it with 'BID' which means twice a day.