Obviously u can take drops on tongue, but the thing u have to observe is with overdose of any medicine is not good(if its taken mistakenly for one or two times then it's cool). Best thing is Homoeopathy medicines have no side effects. Next, If u r getting burning sensation for few seconds it's OK, but u r getting more then dissolve with pure water with same quantity of medicine. Surely Green tea can be taken , but gap of minimum 30 mins to be maintained before and after taking dose of medicine.
Next Steps
if needed, contact me through practo