Yes...... I hope your friend can get some help and does not join the very large statistics of the homeless with mental illness. Good luck with your cause!
I am not sure on Philippine law but I would be pretty sure that it is not possible to force someone to take anti psychotic medication without the state first committing a person to a mental hospital. I would also be curious as to how this woman would pay for the prescriptions if she is homeless.
It seems your intentions are good......you are just asking an awful lot from a person (time, money and risking their personal safety). It is sad seeing a good person lose everything due to a preventable/treatable mental illness though. I wish you the best of luck with getting this girl some help.