Review of Parallel World Pharmacy

This anime is close to greatness, it however falls short because it doesn't fully commit and decided to play it safe by adding more traditional isekai elements, but those elements end up detracting from, rather than enhancing the series. You've heard the refrain "All isekai is the same" we know it's not, but people say it anyway, usually to justify review-bombing. Isekai Yakkyoku is able to stand out because of how differently it handles the genre Man dies of overwork and is reincarnated into a new world - we've been here before MC is part of a rich aristocrat family - we've been here before MC is given OP magicpowers - we've been here before
MC quickly realises that he can use his medical and pharmaceutical knowledge to benefit the world and save lives - ah, this is new.

The latter becomes the main focus of the anime, as the synopsis and title suggest, he makes a point of using his old world knowledge to help others, and to open a pharmacy.
What I like here is that it's not just some vague mixing of herbs like you would get in some of the other anime types, instead we get proper medicinal products getting created, proper procedures being followed, actual illnesses being diagnosed and treated. Having worked in that industry myself, it was great to see that they got the details right, and it really makes the difference.

This is where Isekai Yakkyoku shines, when it is grounded in real world medicinal science, when it is focused on treating illnesses, and when it is focused on being a pharmacy, the running of a pharmacy, and the various goods and services that it would provide for all, even cosmetics.

However it is not all sunshine and rainbows, because as I said at the start, it falls short of greatness,

I will avoid getting into spoilers, but being Isekai'd was integral to the story, being from a rich powerful family was integral to the story and the story benefitted from it.
Making the MC OP in magic powers was not integral to the story, and entire magical 'divine blessing' side of the story was a distraction.
If you needed to give the OP magic to get around the manufacturing process, then fine, but he didn't need to be OP, and it didn't need all the rest of it either, and to be blunt, the final episode detracted from what had been a very good story arc and was the weakest part of the entire series.

In short this series did not need magic or OP powers to make it good or exciting - those things actually detracted from the series