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An early example of a pill comes from ancient Rome. They were made of zinc carbonates, [[hydrozincite]] and [[smithsonite]]. The pills were used for sore eyes and were found aboard a Roman ship that wrecked in 140 BC. However, these tablets were meant to be pressed on the eyes, not swallowed.<ref>{{cite web|url=https://www.newscientist.com/article/dn23049-worlds-oldest-pills-treated-sore-eyes.html|title=World's oldest pills treated sore eyes|work=New Scientist|date=7 January 2013|access-date=5 February 2013|url-status=live|archive-url=https://web.archive.org/web/20130122102750/http://www.newscientist.com/article/dn23049-worlds-oldest-pills-treated-sore-eyes.html|archive-date=22 January 2013}}</ref><ref>{{cite journal|title=Ingredients of a 2,000-y-old medicine revealed by chemical, mineralogical, and botanical investigations|journal=PNAS|date=7 January 2013|doi=10.1073/pnas.1216776110|pmid=23297212|volume=110|issue=4|pages=1193–1196|pmc=3557061|last1=Giachi|first1=G.|last2=Pallecchi|first2=P.|last3=Romualdi|first3=A.|last4=Ribechini|first4=E.|last5=Lucejko|first5=J. J.|last6=Colombini|first6=M. P.|last7=Mariotti Lippi|first7=M.|bibcode=2013PNAS..110.1193G|doi-access=free}}</ref>
*Formulation
*Machine: double impression
===Caplets===
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==Tabletting formulations==
[[File:Zoloft bottles.jpg|thumb|Bottles]]
In the tablet-pressing process, it is important that all ingredients be fairly dry, powdered or granular, somewhat uniform in particle size, and freely flowing. Mixed particle sized powders
Some APIs may be compressed into tablets as pure substances, but this is rarely the case; most formulations include
* Usually a ''binder'' is added to help hold the tablet together and give it mechanical strength. A wide variety of binders may be used: some common ones are [[lactose]], dibasic calcium phosphate, [[sucrose]], corn (maize) starch, microcrystalline [[cellulose]], povidone [[polyvinylpyrrolidone]] and modified cellulose (for example, hydroxypropyl methylcellulose and hydroxyethylcellulose).
Often, an ingredient is also needed to act as a ''disintegrator'' to aid tablet dispersion once swallowed, releasing the API for absorption. Some binders, such as starch and cellulose, are also excellent disintegrators.▼
▲* Often, an ingredient is also needed to act as a ''disintegrator'' to aid tablet dispersion once swallowed, releasing the API for absorption. Some binders, such as starch and cellulose, are also excellent disintegrators.
==Tablet properties==
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==See also==
* [[Reagent testing]]
* [[3D printed medicine|3D drug printing]]
==References==
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[[Category:Chemical engineering]]
[[Category:
[[Category:Drug delivery devices]]
[[Category:Dosage forms]]
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