US State Dept. Guidance for those in The US is Contact Philippine Consulate in your district or Their DC Embassy in The US;
If traveling with prescription medication, check with the Government of the Philippines to ensure the medication is legal in the Philippines and to obtain clearance to enter the country with it. Carry your prescription medication in original packaging with your doctor’s prescription.
I see they issue guidance for PH REQUIREMENTS FOR MEDICAL MISSIONS so they should be able to provide an answer.
Embassy of the Philippines - Home
Wise of you to be vigilant. Read this OSAC article.