Just after ideas on how to tackle this.... DS1 has started saying he is sick and pretending to take tablets

I suspect this is due to the huge amount of attention DS2 needs, and my constantly saying "just a minute love, ds2 is sick, just got to get him settled, just doing his tablet" etc (which i am because he has severe reflux).

I see he is expressing his need for more attention, and i am devastated its manifested itself this way.... we tend to live holistically and i hate that he's picked up the message of "you're sick, you take a tablet", but it just so happens, that out of everything we've tried for DS2, he still has the losec tablets. I myself also take various vitamins and was just on 3 separate courses of antibiotics the past month, so he saw me taking a myriad of tablets too

So far, i've just been reassuring him that he's not sick, and explaining that tablets are only for sick people if they need them...... BUT perhaps i should not be dismissing his conviction that he is sick, though i also don't want to humour him when he isn't... HOW do i tackle this? i want him to feel heard and valid... but also understand that he isn't sick and that i am uncomfortable with him pretending to take tablets. (he literally picks up little things and puts them in his mouth - pretending of course). Would you suggest engaging in more conversation about what it means to be sick, and the treatment options (ie, theres more than just medication) or would you say its just a phase and to not make a big deal about it - ie, distraction, change subject.