I don't know where you live but pilocarpine for narrow angles is antiquated therapy that I haven't used in 20+ years. If you have narrow angles you need a laser irodotomy (hole in the iris), it will open the angles and prevent angle closure. Prolonged use of pilocarpine makes the pupil still and frozen small preventing a satisfactory view of the retina.
I cannot tell you why your eye is red. Angle closure is a cause of red eye but usually blurred vision, severe pain, nausea and vomiting. I would get to the closest MODERN ophthalmology clinic you can.
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