Can Tetrasyl Be Used If Exposure To Sun Is There?

hi im going to use tetrasyl 300 from 1 - 3 months.. im flyin to tajikistan in 10 days and travelin on bicycle from there and to thailand, ill be traviln for a year.. was wonderin if its safe to use tetrasyl while down there. it says you should be aware of sun while on this medication. since there is more sun and im pretty much going to be outside all day while im using tetrasyl ( 1 - 3 months ) what do you think?