21 C.F.R. § 520.88b
Amoxicillin trihydrate for oral suspension.
Cite as 21 C.F.R. § 520.88b (2026)
(a)
Specifications.
When reconstituted, each milliliter contains amoxicillin trihydrate equivalent to 50 milligrams (mg) amoxicillin.
(b)
Sponsor.
See No. 054771 in § 510.600(c) of this chapter.
(1)
Conditions of use
—(i)
Dogs
—(A)
Amount.
Administer orally 5 mg per pound (/lb) of body weight, twice a day for 5 to 7 days.
(B)
Indications for use.
Treatment of infections caused by susceptible strains of organisms as follows: respiratory tract (tonsillitis, tracheobronchitis) caused by
Staphylococcus aureus, Streptococcus
spp.,
Escherichia coli,
and
Proteus mirabilis;
genitourinary tract (cystitis) caused by
S. aureus, Streptococcus
spp.,
E. coli,
and
P. mirabilis;
gastrointestinal tract (bacterial gastroenteritis) caused by
S. aureus, Streptococcus
spp.,
E. coli,
and
P. mirabilis;
bacterial dermatitis caused by
S. aureus, Streptococcus
spp., and
P. mirabilis;
and soft tissues (abscesses, lacerations, and wounds) caused by
S. aureus, Streptococcus
spp.,
E. coli,
and
P. mirabilis.
(C)
Limitations.
Federal law restricts this drug to use by or on the order of a licensed veterinarian.
(ii)
Cats
—(A)
Amount.
Administer orally 5 to 10 mg/lb of body weight, once daily for 5 to 7 days.
(B)
Indications for use.
Treatment of infections caused by susceptible strains of organisms as follows: upper respiratory tract due to
Staphylococcus
spp.,
Streptococcus
spp.,
Haemophilus
spp.,
E. coli, Pasteurella
spp., and
P. mirabilis;
genitourinary tract (cystitis) due to
S. aureus, Streptococcus
spp.,
E. coli, P. mirabilis,
and
Corynebacterium
spp.; gastrointestinal tract due to
E. coli, Proteus
spp.,
Staphylococcus
spp., and
Streptococcus
spp.; skin and soft tissue (abscesses, lacerations, and wounds) due to
Staphylococcus
spp.,
Streptococcus
spp.,
E. coli,
and
Pasteurella multocida.
(C)
Limitations.
Federal law restricts this drug to use by or on the order of a licensed veterinarian.
(2) [Reserved]
(c)
Sponsors.
See Nos. 000856 and 051311 in § 510.600(c) of this chapter.
(1)
Conditions of use.
Dogs
—(i)
Amount.
Administer orally 5 mg/lb of body weight, twice a day for 5 to 7 days.
(ii)
Indications for use.
Treatment of bacterial dermatitis due to
S. aureus, Streptococcus
spp.,
Staphylococcus
spp., and
E. coli,
and soft tissue infections (abscesses, wounds, lacerations) due to
S. aureus, Streptococcus
spp.,
E. coli, P. mirabilis
and
Staphylococcus
spp.
(iii)
Limitations.
Federal law restricts this drug to use by or on the order of a licensed veterinarian.
(2) [Reserved]
[57 FR 37319, Aug. 18, 1992; 57 FR 42623, Sept. 15, 1992, as amended at 60 FR 55658, Nov. 2, 1995; 62 FR 13302, Mar. 20, 1997; 67 FR 67521, Nov. 6, 2002; 68 FR 54658, Sept. 18, 2003; 68 FR 55824, Sept. 29, 2003; 79 FR 28816, May 20, 2014; 81 FR 17607, Mar. 30, 2016]
- Cross-references to the CFR
- 510.600