Can taking a zanaflex make your pupils small?

Yes, taking Zanaflex (tizanidine), a muscle relaxant, can potentially cause miOSis, or constricted pupils, as a side effect. This occurs because Zanaflex acts on the central nervous system and can influence the autonomic nervous system's control over pupil size. If you experience significant changes in pupil size or other concerning symptoms, it is advisable to consult a healthcare professional.