Hello siminni,
Welcome to just answer team. What I get from your description is that the tablet has number 10 /5Z or SZ written on it. Well there is no tablet with the descriptionof 5Z available. However I could find one tablet with the description of 10/SZ. Its called as cetirizineHCL and this is an antihistamine drug and is used for allergies, hay fever or angioedemas.
Hopefully this was helpfull enough and do ask for further assisstance
Take Care
Dr Faiqa
Doctor
MBBS,FCPS. Experience in Medicine, Surgery Gynae/OBS and Ophthalmology