Yes, there are exceptions to senior citizen discounts on medicine in the Philippines. While RA 9994 provides a 20% discount for senior citizens on medications, certain items may not be covered, such as over-the-counter drugs, medical supplies, or prescriptions not listed in the law. It's advisable to check with your local pharmacy or the Department of Health for specific regulations that apply. Always confirm eligibility with your healthcare provider or pharmacist to ensure you receive the appropriate discounts.