All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
The Prophetic narration which you mentioned in the question is authentic and is reported by Al-Bukhari, Muslim and others .
The narration is proves the permissibility of drinking the urine of camels and that it is a beneficial medicine. Moreover, some doctors stated this fact as well, like Ibn Seenaa in his book entitled ''Al-Qaanoon (The Law (of medicine))''.
The urine of camels and that of cows is pure; and this is the view of the majority of the scholars .
Similarly, the urine and dung of animals which we are allowed to eat their meat, is pure as stated by the scholars .
For more benefit on the permissibility of seeking treatment with the urine of camels, please refer to Fatwa instructing the sick to drink camel urine for cure">85944.
Allaah knows best.