Frequency of Taking Medicine

ow often you should take any medicine is called frequency. For example, your doctor may ask you to take medicine once a day or twice a day.

Your doctor may write this in abbreviations:

Frequency	Abbreviations	Full Form
Once a day	Q.D.	QUAQUE DIE
	OD	OMNI DIE
Twice daily	B.I.D. OR BD	BIS IN DIE
	BDS	BIS DIE SUMENDUM
3 times a day	T.I.D.	TER IN DIE
	TDS	TER DIE SUMENDUM
4 times a day	Q.I.D.	QUATER IN DIE
	Q.D.S.	QUATER DIE SUMENDUS
Every 4 hours	Q.Q.H.	QUATER QUAQUE HORA
Every other day	Q.O.D.	QUAQUE ALTERA DIE
	EOD	EVERY OTHER DAY
Every night	Q.N.	QUAQUE NOCTE
Every night at bedtime	Q.H.S.	Q.H.S.
Every hour	Q.H.	QUAQUE HORA
As needed	P.R.N.	PRO RE NATA

The doctor should not use abbreviations for advising frequency of taking medicine. The most of health organizations prohibit it for safe medical practice and better understanding for patients.