Travelling With 1 Year Old

Hi Mummies First time travelling out of SG with LO and its a 7hrs flight. We will fly out during day time where she's the most active. I was wandering if I should get some special meds from PD (eg. Those travelling meds for kids for some calming effect or smthk) I'm scared that she may not be able to take in the pressure and may cry and be cranky during that 7hrs. Pls advise.