Historical external preparation containing Ammonia; its presence on a skin surface is not evidence of benefit to a distant organ.

Historical camphor-containing external preparation. Simple and compound forms differ in composition.

Historical soap-containing external preparation, also containing camphor in the British formula.

Historical external preparation containing turpentine.

Historical solution of arsenite and carbonate of potassium, specified as Liquor arsenicalis in the 1864 British standard. It is not a modern general-purpose tonic.

An arsenic-containing salt appearing in historical materia medica; hydrated and dried forms have different mass composition.

An arsenic-containing historical medicinal article, Ferri Arsenias.

Copper-containing salt used historically for astringent, emetic and external applications; period use does not establish current safety.

Atropine is a competitive antagonist of muscarinic acetylcholine receptors. Its effects depend on the receptor-bearing tissue and ongoing acetylcholine signaling. Blocking a receptor is distinct from destroying the transmitter.^[ref]

Ferri et Quiniae Citras is a citrate preparation combining iron and quinine. The combined article should be distinguished from quinine alone or an iron-only citrate.^[ref]

Reduced susceptibility of a microorganism to an antimicrobial agent, requiring attention to organism identification, susceptibility and the clinical syndrome.

A medicine that increases urinary excretion of water and usually particular dissolved substances. The indication, fluid balance and monitoring requirements depend on the cause of the fluid retention.

Tranexamic acid limits breakdown of fibrin by interfering with plasminogen binding. Stabilizing an existing clot is mechanistically distinct from directly producing new fibrin.^[ref]

Labetalol blocks both alpha- and beta-adrenergic receptors. Its effects on vascular tone and cardiac activity reflect these combined actions. A mixed receptor profile distinguishes it from a drug acting at only one adrenergic target.^[ref]

Nifedipine inhibits calcium ion entry through voltage-dependent channels, reducing activation of vascular smooth muscle. Reduced contraction lowers vascular resistance. This connects a membrane-level action to a circulatory effect.^[ref]

Hydralazine is a vasodilator whose action chiefly reduces resistance in small arteries. A fall in vascular resistance can evoke compensatory changes in heart rate and fluid regulation. Direct vascular action and the whole-body response are separate parts of its pharmacology.

Pharmacy concerns the preparation, quality and supply of medicines. Formulation connects chemical identity to a usable pharmaceutical preparation; two products containing the same named drug need not have identical concentration or delivery properties.

An anthelmintic is a substance acting against parasitic worms. Its effect depends on parasite species, developmental stage and drug exposure. Killing an intestinal adult and acting on a tissue larva are therefore different pharmacological tasks.

Conversion of a transformed column of homogeneous coordinates $(X,Y,Z,W)$ with $W\ne 0$ to $(X/W,Y/W,Z/W)$. This is the nonlinear step in an otherwise matrix-based perspective projection pipeline.

An immutable multiset can expose a covariant type parameter because reading an element only produces that type. Addition accepts a new type parameter with a lower type bound, add[U >: T](x: U), and returns a new ISet[U]. The old ISet[T] retains its contents and original element guarantee. Deletion returns both the removed value and a new remaining multiset; it does not mutate the old one. Duplicate occurrences are preserved.