It's listed here in the chewable form, manufacturer is not specified:
https://www.drugs.com/inactive/aspartame-191.html
I'm aspartame sensitive. I'm also sensitive to acesulfame potassium, which is usually mixed with it or other artificial sweeteners. I'll start feeling "fuzzy" (have a simple partial) if it's in something that someone gives me, otherwise I always read labels and avoid them like the plague. It's now almost impossible to find bubble gum without aspartame.
Sucralose/Splenda seemed ok when I was on keto, but I wasn't 100% sure. It counts as a carb, so that may have been giving me problems, rather than the thing itself

Stevia seemed fine. Saccharine, which is supposed to be safe, was impossible to find. I think sugar alcohols are just fine (usually have "ol" at the end), but they do count as carbs.
https://www.healthline.com/nutrition/sugar-alcohols-good-or-bad#what-they-are
Sweeteners should NOT be in pills *palmslap*. Maybe it's cheaper than whatever they were using before as a filler, like cornstarch or something. I can't understand why stuff made in a chemical plant is inevitably cheaper than actual food. LOL, but it's sad. FWIW there is some kind of sweetener in Advil tablets coating, but I don't know what it is.
I've been forced to go on generics, and I've felt awful ever since. I've had problems with side effects and seizures on several generics for two meds.