A new use for paracetamol in a method of treating glaucoma, which method comprises administering to a patient in need of such treatment 500 mg to 1000 mg of paracetamol in oral format 4 to 6 hourly. An ophthalmic solution is also provided containing between 0.1 to 5% of paracetamol which is administered as one to two drops in each eye 4 to 6 hourly. The ophthalmic solution further includes one or more of the following excipients: hydroxypropylmethylcellulose, benzalconium chloride, polyacrylic acid such as Teargel®.