Kottakkal Kusmanda Rasayanam is an Ayurvedic medicine manufactured by Arya Vaidya Sala, Kottakkal. It is described in भैषज्यरत्नावली रक्तपित्त अधिकार ४५ - ५१ and अष्टांगहृदयम्  चिकित्सास्थान 3 / 114 - 117. It is available in a bottle of 200 g.

The main ingredient of Kottakkal Kusmanda Rasayanam is Kusmanda or Ash gourd or Benincasa hispida which belongs to Cucurbitaceae Family having Madhura Rasa, Sheeta Virya, Madhura Vipaka, Laghu Guna and Medhya by Prabhava.

Kusmanda have Balya, Deepan, Rasayana, Hrudya, Vajikarana, Mutravisodhaka, Ruchiprada  etc Karma. It is Tridosha Shamaka but mainly Pittaghana and Saptadhatu vardhaka. Kusmanda Rasayanam can be indicated in Jwara, Kasa, Hidma, Shwasa, Raktapitta, Kshata, Kshaya, Trishna, Chardi, Tama, etc.

Kusmanda Rasayanam can be prepared by taking  1 Tula or 4.8 kg Kusmanda or Benincasa Hispida fruits boiling them in water and reducing the Kwath to half the quantity. Filter the Kwath and keep Kusmanda pieces under sunlight to evaporate excess moisture.

Take 1 Prastha (768 gm) Ghrutam (Cows Ghee) in Tamra vessel add sundried Kusmanda in it cook until it turns golden brown add the remaining Kwath in it along with Khanda Sitha, and cook them properly till it attains Avaleha like consistency adds all Praskepa Dravyas except Madhu. Switch off the flame, and keep the Tamra vessel aside to cool down, once it attains room temperature add Madhu and stirred it well. Pack the Avaleha in an airtight bottle and stored them away from sunlight.