RxNav, the "default paths" table, and API function getRelatedByType have been adjusted to show only clinically relevant links to and from precise-formulation term types SCDFP, SCDGP, and SBDFP.

Specifically, these changes ensure that:

• The precise formulations related to a concept do not conflict with any definitional feature of that concept. In particular, the precise formulations related to a concept defined at least in part by a precise ingredient have the same precise ingredient as that concept.
  For example: BPCK "{31 (doxycycline monohydrate 100 MG Oral Tablet [Adoxa]) } Pack [Adoxa Pak 1/100]" is not related to SCDGP "doxycycline anhydrous Pill".
• The precise formulations related to a concept have at least one related product in common with that concept.
  For example: BN "Tigan", which at the time of this writing corresponds to only one product, "Tigan 200 MG in 2 ML Injection", is not related to SCDFP "trimethobenzamide hydrochloride Injectable Solution".

In most cases, the corrections were achieved by means of a different sequence of RxNorm relationships. For example, the BPCK => SCDGP path (in the first example above) has been re-routed from "BPCK => GPCK => SCD => SCDG => SCDGP" to "BPCK => GPCK => SCD => SCDFP => SCDGP" to avoid broadening the precise ingredients.

A few cases required linking not just two, but three immediate neighbors of a concept. Written serially, as paths rather than miniature graphs, these paths must revisit at least one concept. For example, the SCDGP => DFG path has been re-routed from "SCDGP => SCDG => DFG" to "[DFG => SCDG =>] SCDGP => SCDFP => SCD => SCDG => DFG", i.e., linking one SCDG to three concepts, the SCDGP, the DFG, and the SCD. The main part of the path, SCDGP => SCDFP => SCD => SCDG => DFG, ensures that the two terminal concepts, SCDGP and DFG, have a common related product (the SCD), but it does not ensure that they have the same dose-form group: that guarantee was lost with the hop from SCDGP to SCDFP. The filter part of the path, [DFG => SCDG =>] SCDGP…, requires that the SCDG and SCDGP be directly related. To facilitate straightforward, start-to-finish traversal, the path can alternatively be stated with an interior detour instead of a filter: SCDGP => SCDG => DFG => SCDG => SCDGP => SCDFP => SCD => SCDG => DFG.

The table below lists the path changes. In cases that require linking a concept to more than two immediate neighbors, the rationale of the New Path is clarified by setting the filter off from the main part of the path by square brackets. (The complete Default Paths table in the RxNav Overview lists all paths in the start-to-finish traversal format.)

Start to End	Old Path	New Path
BN => SBDFP	BN => SBDF => SBDFP	BN => SBD => SBDFP
BN => SCDFP	BN => SBDF => SCDF => SCDFP	BN => SBD => SCD => SCDFP
BN => SCDGP	BN => SBDG => SCDGP	BN => SBD => SCD => SCDFP => SCDGP
BPCK => SCDGP	BPCK => GPCK => SCD => SCDG => SCDGP	BPCK => GPCK => SCD => SCDFP => SCDGP
GPCK => SCDGP	GPCK => SCD => SCDG => SCDGP	GPCK => SCD => SCDFP => SCDGP
IN => SBDFP	IN => BN => SBDF => SBDFP	IN => SCDC => SBD => SBDFP
IN => SCDFP	IN => SCDFP	IN => SCDC => SCD => SCDFP
IN => SCDGP	IN => SCDFP => SCDGP	IN => SCDC => SCD => SCDFP => SCDGP
MIN => SCDGP	MIN => SCD => SCDG => SCDGP	MIN => SCD => SCDFP => SCDGP
PIN => SCDFP	PIN => SCDFP	PIN => SCDC => SCD => SCDFP
PIN => SCDGP	PIN => SCDC => SCD => SCDG => SCDGP	PIN => SCDC => SCD => SCDFP => SCDGP
SBD => SCDGP	SBD => SCD => SCDG => SCDGP	SBD => SCD => SCDFP => SCDGP
SBDC => SCDGP	SBDC => SBD => SCD => SCDG => SCDGP	SBDC => SBD => SCD => SCDFP => SCDGP
SBDF => SBDFP	SBDF => SBDFP	SBDF => SBD => SBDFP
SBDF => SCDFP	SBDF => SCDF => SCDFP	SBDF => SBD => SCD => SCDFP
SBDF => SCDGP	SBDF => SBDG => SCDGP	SBDF => SBD => SCD => SCDFP => SCDGP
SBDFP => BN	SBDFP => SBDF => BN	SBDFP => SBD => BN
SBDFP => DF	SBDFP => SBDF => DF	SBDFP => SBD => DF
SBDFP => DFG	SBDFP => SBDF => SBDG => DFG	SBDFP => SBD => SBDG => DFG
SBDFP => IN	SBDFP => SBDF => BN => IN	SBDFP => SBD => SCDC => IN
SBDFP => SBDF	SBDFP => SBDF	SBDFP => SBD => SBDF
SBDFP => SBDG	SBDFP => SBDF => SBDG	SBDFP => SBD => SBDG
SBDFP => SCDF	SBDFP => SBDF => SCDF	SBDFP => SBD => SCD => SCDF
SBDFP => SCDFP	SBDFP => SCDFP	SBDFP => SBD => SCD => SCDFP
SBDFP => SCDGP	SBDFP => SBDF => SBDG => SCDGP	SBDFP => SBD => SCD => SCDFP => SCDGP
SBDG => SBDFP	SBDG => SBDF => SBDFP	SBDG => SBD => SBDFP
SBDG => SCDGP	SBDG => SCDGP	SBDG => SBD => SCD => SCDFP => SCDGP [=> SCDG => SBDG]
SCD => SCDGP	SCD => SCDG => SCDGP	SCD => SCDFP => SCDGP
SCDC => SCDGP	SCDC => SCD => SCDG => SCDGP	SCDC => SCD => SCDFP => SCDGP
SCDF => SBDFP	SCDF => SBDF => SBDFP	SCDF => SCD => SBD => SBDFP
SCDF => SCDFP	SCDF => SCDFP	SCDF => SCD => SCDFP
SCDF => SCDGP	SCDF => SCDG => SCDGP	SCDF => SCD => SCDFP => SCDGP
SCDFP => BN	SCDFP => SCDF => SBDF => BN	SCDFP => SCD => SBD => BN
SCDFP => DF	SCDFP => SCDF => DF	SCDFP => SCD => DF
SCDFP => DFG	SCDFP => SCDGP => SCDG => DFG	SCDFP => SCD => SCDG => DFG
SCDFP => IN	SCDFP => IN	SCDFP => SCD => SCDC => IN
SCDFP => PIN	SCDFP => PIN	SCDFP => SCD => SCDC => PIN
SCDFP => SBDF	SCDFP => SCDF => SBDF	SCDFP => SCD => SBD => SBDF
SCDFP => SBDFP	SCDFP => SBDFP	SCDFP => SCD => SBD => SBDFP
SCDFP => SCDF	SCDFP => SCDF	SCDFP => SCD => SCDF
SCDFP => SCDG	SCDFP => SCDGP => SCDG	SCDFP => SCD => SCDG
SCDFP => SCDGP	SCDFP => SCDGP	SCDFP => SCD => SCDFP => SCDGP
SCDG => SCDFP	SCDG => SCDGP => SCDFP	SCDG => SCD => SCDFP
SCDG => SCDGP	SCDG => SCDGP	SCDG => SCD => SCDFP => SCDGP
SCDGP => BN	SCDGP => SBDG => BN	SCDGP => SCDFP => SCD => SBD => BN
SCDGP => BPCK	SCDGP => SCDG => SCD => GPCK => BPCK	SCDGP => SCDFP => SCD => GPCK => BPCK
SCDGP => DF	SCDGP => SCDFP => SCDF => DF	SCDGP => SCDFP => SCD => DF
SCDGP => DFG	SCDGP => SCDG => DFG	SCDGP => SCDFP => SCD => SCDG => DFG
SCDGP => GPCK	SCDGP => SCDG => SCD => GPCK	SCDGP => SCDFP => SCD => GPCK
SCDGP => IN	SCDGP => SCDFP => IN	SCDGP => SCDFP => SCD => SCDC => IN
SCDGP => MIN	SCDGP => SCDG => SCD => MIN	SCDGP => SCDFP => SCD => MIN
SCDGP => PIN	SCDGP => SCDG => SCD => SCDC => PIN	SCDGP => SCDFP => SCD => SCDC => PIN
SCDGP => SBD	SCDGP => SCDG => SCD => SBD	SCDGP => SCDFP => SCD => SBD
SCDGP => SBDC	SCDGP => SCDG => SCD => SBD => SBDC	SCDGP => SCDFP => SCD => SBD => SBDC
SCDGP => SBDF	SCDGP => SBDG => SBDF	SCDGP => SCDFP => SCD => SBD => SBDF
SCDGP => SBDFP	SCDGP => SCDG => SCD => SBD => SBDFP	SCDGP => SCDFP => SCD => SBD => SBDFP
SCDGP => SBDG	SCDGP => SBDG	SCDGP => SCDFP => SCD => SBD => SBDG [=> SCDGP]
SCDGP => SCD	SCDGP => SCDG => SCD	SCDGP => SCDFP => SCD
SCDGP => SCDC	SCDGP => SCDG => SCD => SCDC	SCDGP => SCDFP => SCD => SCDC
SCDGP => SCDF	SCDGP => SCDG => SCDF	SCDGP => SCDFP => SCD => SCDF
SCDGP => SCDFP	SCDGP => SCDFP	SCDGP => SCDFP => SCD => SCDFP
SCDGP => SCDG	SCDGP => SCDG	SCDGP => SCDFP => SCD => SCDG [=> SCDGP]