While it is true they are different when one is sick that may be more useful in this case. [Maybe a certain flavor would be better when one was sick than it might be to those who weren't?

He doesn't know! He's new at this and not actually a doctor even if he's acting like one. But, uh... this is definitely, totally safe! Maybe.]

Do not force yourself if you find it too unpleasant. Although it's made to help your illness the taste can certainly make you feel sick in other ways. [He motions towards the far left bowl.]

I tried to make it sweeter to mask the bitterness. That one specifically with copious amounts of sugar. Oh, but do be mindful to only taste a small sip's worth.