1. Based on Therapeutic Action: 

1. Virechana Nasya: This type uses strong, sharp herbs or powders to induce a powerful cleansing action, expelling accumulated Kapha from the sinuses and head. It’s often used for chronic sinusitis and severe headaches. 
2. Brumhana Nasya: Rich, unctuous substances like medicated ghee, milk, or sesame oil are administered to nourish and strengthen the head and neck region. This is suitable for Vata-related conditions like migraines, dry sinuses, and degenerative diseases. 
3. Shamana Nasya: This type uses less potent preparations to pacify aggravated doshas and is a gentle, regular therapy for minor issues like allergies, nasal congestion, or general well-being. 

2. Based on the Speed of Drug Effect: 

1. Pratimarsha Nasya: A mild, lubricating Nasya that involves the administration of just a few drops of medicated oil (usually sesame or medicated) and can be done daily. It is excellent for preventative care and daily cleansing. 
2. Navana Nasya: A more intensive, traditional Nasya procedure that involves a higher dose of medicated oil and is performed less frequently. It is the most common form of Nasya used for therapeutic purposes. 
3. Avapida Nasya: A forceful and rapid form of Nasya where freshly squeezed juice from medicinal plants is administered. This is a very potent method used in specific, severe conditions. 
4. Dhuma Nasya: This technique involves inhaling medicated fumes from burning herbs. It is used for respiratory conditions and to dry up excess mucus.