Alstonia scholaris - Ruk attana - රැක්කත්තන

Botanical name  - Alstonia scholaris
Family                 - Apocynaceae
English name      - Devils tree
Sanskrit names   - Sapta parna, Visalatvak, Sarada, Vishamacchada
Singhalese name- Ruk attana
Parts used   - Bark, Latex, Flowers, leaves & Extract
Properties:    
Rasa          Tikta, Kashaya
Guna         Laghu, Snigdha
Veerya      Ushna            
Vipaka      Katu
Attributes / Karma:
Alleviates Tri dosha. Specially Kapha, Vata. Promote appetite. (Saraka) nutritive
Cures-wounds, skin diseases, blood disorders, Krimi, asthma, Gulma.                                                                                                                                                                                                                  
Medicinal uses

External
• Putrefied wounds – paste of the bark is applied.
• Wounds – tender leaves are first boiled, made in to a paste & then applied on wounds.
• Headache – powder of the flowers is used for nasal administration.

Internal
• Decoction or the powder of bark is used for loss of appetite, abdominal pains, abdominal lump & dysentery.
• Twigs of the tree are used for brushing teeth as it is bactericidal.
• Skin diseases – mixture of decoction + Copacini is used.

Formulations
Saptaparna satavadi vati
Saptaccadadi taila