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Benazepril (trade name: Lotensin) belongs to the class of drugs known as angiotensin-converting enzyme (ACE) inhibitors and is used primarily to lower high blood pressure (hypertension). This drug can also be used in the treatment of congestive heart failure and type II diabetes. Benazepril is a prodrug which, following oral administration, undergoes biotransformation in vivo into its active form benazeprilat via cleavage of its ester group by the liver. Angiotensin-converting enzyme (ACE) is a component of the body's renin–angiotensin–aldosterone system (RAAS) and cleaves inactive angiotensin I into the active vasoconstrictor angiotensin II. ACE (or kininase II) also degrades the potent vasodilator bradykinin. Consequently, ACE inhibitors decrease angiotensin II concentrations and increase bradykinin concentrations resulting in blood vessel dilation and thereby lowering blood pressure.

Ibuprofen is a very common NSAID drug used to treat pain and inflammation. This includes headaches, muscle pain and fever. It is sold under the brand name Advil or Motrin. Ibuprofen is typically ingested orally, although in the USA an intravenous version can be used. It inhibits cyclooxygenase (COX) non-selectively. This enzyme is responsible for the creation of prostaglandins, which allow pain to be felt. Inhibiting COX makes prostaglandin creation more sparse, thus resulting in less pain for the patient using ibuprofen. Arachdonic acid is converted into prostaglandin H2 by using cytosolic prostaglandin G/H synthase (COX). These enzymes are available as COX1 and COX2, and are encoded by PTGS1 (COX1) and PTGS2 (COX2). Ibuprofen may also inhibit fatty acid amide hydrolase (FAAH), which results in the activation of antinociceptive axis, which then metabolizes the endocannabinoid anandamide.