Y'see there's a problem with that. Measured doses, fine, but those measured doses are for some mythical 'average' person.
It's not only body size that's the issue, it's the individual's response to the drug too.
Somefolks are overly 'reactive' to certain chemicals. Some folks are aware enough that they can micro dose quite happily. Some folks are more aware, or less aware, of pain than others.
Basically the drug companies play it safe and create a 'one size will do' kind of tablet. That it sometimes doesn't do it very well, or in others does it waaaay too much is written off just like the long list of side effects; and they totally miss out the synergy of the entire plant base by refining out only the 'active chemical' bit. The other parts, like the tannin, also have an effect in the herbal drug action.
A wee bit of willow bark (find goat willow, it's much the sweeter variety) and chew on the end of one of the twigs. You'll taste the bitter compound, and you'll not be able to chew that much before you will have definitely had enough of it. Even those of us who don't really taste bitter can feel the tanniny dryness. Personally I only chew the bark when I'm stripping out cordage from it
.and my dentist gives me a row because, and I quote, "Your teeth aren't meant for that!!", but I do feel the effect (RA for over half my life) and no upset gut because of it.
Tummy wise, the willow bark raw like this is gentler than the purified chemicals in aspirin tablets, and the painkilling is slower but longer lasting. But, and it's a big but, it's a judgement call. How much, how often, how long ?
Generally the advice from days when it was common place to use such things was, three days and do you really need it more ?
The advice from the scholarly Herbal Drugs and Phytopharmaceuticals is well worth reading, (the book is expensive, but if you can find a second hand copy for twenty five quid or so, it's well worth the money if this kind of thing interests you) but there is masses of advice out there on how to use the stuff.
"Two to three grammes of finely chopped or ground bark is put into a cup of water. The water is brought to the boil and after five minutes strained and drunk. May be repeated three or four times a day. " That's about two teaspoonsful of finely chopped bark to the cup.
Another article
.
https://books.google.co.uk/books?id...al-Drugs-Phytopharmaceuticals, willow&f=false
Legally I am not allowed to advise, or encourage someone to take any herbal medicine since I am not a trained medical herbalist. There are some who are who are members here, but they don't know everyone who is likely to read this forum, they cannot be held accountable for anyone's action if they do take something they suggest here.
So, it's a judgement call. Your body, your judgement
.probably why most folks just pop the pills
M