Quality of compounded topical 2% diltiazem hydrochloride formulations for anal fissure

Table 2 Mean potency as percentage of label claim for 3 prescriptions of compounded topical 2% diltiazem filled by 12 retail pharmacies

Pharmacy No.	Label claim (mean ± SD)	Relative SD
1	95.9% ± 9.8%	8.7
2	107.3% ± 16.5%	15.4
3	95.9% ± 2.2%	2.2
4	103.3% ± 5.1%	4.9
5	86.5% ± 20.1%	23.2
6	106.2% ± 1.8%	1.7
7	81.6% ± 6.5%	8.0
8	100.1% ± 2.0%	1.9
9	63.2% ± 3.8%	6.0
10	70.4% ± 3.2%	4.5
11	68.8% ± 6.5%	9.4
12	102.9% ± 0.8%	0.8