Table 3.

List of preservatives.

Name of Preservative	Concentration [%]	Form of Drug
Thiomersal	0.005–0.01% [78] 0.0005–0.01% up to 0.007% [79]	vaccines, test solutions, topical preparations (creams), ear drops, eye drops
Parabens	0.065–0.15% up to 0.5%	eye medications ointments, oral medications
Benzalkonium chloride	up to 0.02% [80]	drugs and eye preparations,
Chlorhexidine	up to 0.05% [81]	eye medications