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| Preservative | Number of medications | % of medications |
|---|---|---|
| Chlorbutol IP 0.5% | 18 | 18 |
| Benzalconiumchloride 0.01% | 59 | 58 |
| Phenylmercuric nitrate IP 0.001% | 11 | 11 |
| Chlorhexidine acetate | 1 | 1 |
| Thiomersal IP 0.005% | 3 | 3 |
| None | 9 | 9 |
| Total | 101 |
