| S - Sensory Organs | A formulation approved both for use in the eye/ear is classified in S03. Formulations approved for eye, ear and nose are also classified in S03. Formulations only licensed for use in the eye or the ear are classified in S01 and S02, respectively.
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| S01 - Ophthalmologicals | Most of the drugs in this group are topical preparations. Systemic preparations with clear ophthalmological indications are also classified in this group.
Small amounts of antiseptics in eye preparations do not influence the classification, e.g. benzalconium.
See also S03 - Ophthalmological and otological preparations.
| DDDs have been assigned for antiglaucoma preparations only.
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| S01G - Decongestants and Antiallergics | This group comprises drugs used to treat symptoms of e.g. allergy.
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| S01GA - Sympathomimetics Used As Decongestants | This group comprises sympathomimetics used as decongestants, plain and in combination. E.g. low strength phenylephrine in combination with other drugs is classified in this group. See also S01FB.
Ophthalmic solutions of oxymetazoline for the treatment of acquired blepharoptosis are also classified in S01GA04 - oxymetazoline.
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