In an article about how to deal with food poisoning, from the castellano website Hola.com, I read the following sentence:
La solución se debe empezar a beber en cantidades pequeñas cada hora o 2 horas, según se vaya tolerando.
Question: Even though I understand the meaning of the sentence, could you please help to explain grammatically the use of these two "se" in the sentence? My assumptions:
"La solución se debe empezar a beber" - Here I guess either reflexive "deberse" is used or passive voice is used (...must be started to drink). I tend more towards passive...
"Se vaya tolerando" - I know the construction "ir + present progressive" for cases when you start or gradually doing something ("Voy comprendiendo la verdad - I am starting to understand the truth"). As for my sentence, it could mean "as you gradually tolerate more and more of the drink".