For soothing a stomachache or headache, Te de Manzanillo (also known as chamomile tea) is the most appropriate herbal remedy among the options provided. Chamomile has anti-inflammatory and calming properties that can help alleviate digestive issues and reduce tension, making it effective for both stomachaches and headaches.
Sarsaparilla, Sangre de Draco, and Una de gato are also herbal remedies but are generally not specifically known for addressing stomachaches or headaches.