Dosage regimens for antibiotics with narrow therapeutic ranges

Below are:

Height and weight conversion tables and a maximum body weight (MBW) table for creatinine clearance (CrCl) estimation.
CrCl equation (N.B. The CrCl calculator is available via the GGC Medicines App or on NHSGGC StaffNet / Clinical Info section.)

Maximum body weight

Maximum body weight table
Height (feet / inches)	Height (cm)	MBW (kg) (male)	MBW (kg) (female)
4'8"	142	49	43
4'9"	145	52	47
4'10"	147	54	49
4'11"	150	58	52
5'0"	152	60	55
5'1"	155	62	58
5'2"	158	66	60
5'3"	160	68	62
5'4"	163	71	66
5'5"	165	74	68
5'6"	168	77	71
5'7"	170	79	74
5'8"	173	82	77
5'9"	175	85	79
5'10"	178	88	82
5'11"	180	90	85
6'0"	183	94	88
6'1"	185	96	90
6'2"	188	98	94
6'3"	191	101	97
6'4"	193	104	99
6'5"	195	107	101
6'6"	198	109	105
6'7"	201	113	108
6'8"	203	115	110

Weight conversion

Weight conversion table
Stones	lb	kg
5	0	32
5	7	35
6	0	38
6	7	41
7	0	45
7	7	48
8	0	51
8	7	54
9	0	57
9	7	60
10	0	64
10	7	67
11	0	70
11	7	73
12	0	76
12	7	80
13	0	83
13	7	86
14	0	89
14	7	92
15	0	95
15	7	99
16	0	102
16	7	105
17	0	108
18	0	115
19	0	121

Estimation of creatinine clearance

The following 'Cockcroft Gault' equation can be used to estimate creatinine clearance (CrCl).

CrCl (ml/minute) =	[140 – age (years)] x weight (kg)	x 1.23 (male) OR x 1.04 (female)
	serum creatinine (micromol/L)

Cautions!

Use actual body weight (ABW) or maximum body weight (MBW), whichever is lower.
Use 60micromol/L if the creatinine concentration is < 60micromol/L.
This equation may overestimate CrCl in elderly or malnourished patients.
DO NOT USE eGFR.

Last reviewed February 2018