Using multiple packets of no-no at once shouldn't be possible
Can the no-no be set the same way as herbs, where you only have the option to use one at a time? There is no extra benefit to using more than one, so if you accidentally click too fast, you just waste the extra, which is kind of silly.
YES! THANK YOU! We can't drink more drinks than would over-max our mood, or eat more food than would over-max our energy... so items like No-No should be a single-use item only (same with feeding animals should only allow for a certain amount, then they should give a message like "Sorry Bub, I'm totally full")