L-Spec

L-Spec is an injectable antibiotic Excellence sells combining two antibiotics, marketed as its “premium” option for complicated bacterial cases in poultry and swine.

What Is Actually In It

Excellence’s label names two ingredients in L-Spec: Lincomycin and Spectinomycin. The manufacturer’s page does not publish a concentration figure for either beyond the injection-volume dosing described below. Lincomycin and spectinomycin are two distinct antibiotic classes combined into a single injectable product, which Excellence’s own copy describes as “dual action.”

What the Label Says It Is For

Excellence’s label describes L-Spec as a “premium antibiotic with dual action,” calling it a “drug of choice for complicated cases,” and lists it as indicated for prevention and treatment of Fowl Cholera, Infectious Coryza, Chronic Respiratory Disease (CRD), Salmonellosis (described as whitish droppings), Bacterial Enteritis, and Mycoplasma synoviae. That is the manufacturer’s own indication and marketing text, reproduced here rather than restated as this site’s own claim. These are distinct diseases that share overlapping symptoms and are difficult to tell apart without closer examination.

Forms It Comes In

L-Spec is sold as an injectable. Excellence’s label gives separate injection volumes by animal class: 0.5 to 0.8 mL into the breast muscle for cocks and hens, 0.3 to 0.5 mL for stags and pullets, and 1 mL per 10 kg bodyweight for swine, each for 5 consecutive days. That instruction is quoted verbatim in the fact table above, sourced directly from the manufacturer’s own product page, and is not repeated, converted, or adjusted in this body text.

Withdrawal Period

Excellence’s page for L-Spec does not publish a withdrawal period. An absent published figure is not the same as a zero-day withdrawal, and it is not treated as one here, which matters in particular for an injectable antibiotic intended for animals that may later be eaten. Anyone weighing that timing should ask a veterinarian or agrivet.

What This Page Does Not Tell You

This page transcribes what Excellence publishes about L-Spec. It does not tell a reader which of the several named diseases, if any, matches a bird’s or pig’s actual symptoms, nor whether an injectable antibiotic is the appropriate route of treatment for a given case. See /blog/antibiotics-for-chickens-philippines for general background on antibiotic use in poultry, and take a specific animal’s symptoms to a veterinarian, an agrivet, or the local agriculture office before deciding on treatment.