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| Penicillin | Dosage, Route, and Frequency |
| Sodium penicillin G | 10,000-20,000 IU/kg, IV or IM, qid |
| Potassium penicillin G | 25,000 IU/kg, PO, qid |
| Procaine penicillin G | 10,000-30,000 IU/kg, IM or SC, sid-bid |
| Benzathine penicillin G | 10,000-40,000 IU/kg, IM (horses) or SC (cattle), every 48-72 hr |
| Penicillin V | 15,000 IU/kg or 8-10 mg/kg, PO, tid |
| Cloxacillin | 10 mg/kg, IM or PO, qid |
| Ampicillin | 5-10 mg/kg, IV, IM, or SC, bid-tid 10-25 mg/kg, PO, bid-qid |
| Amoxicillin | 4-7 mg/kg, IM, sid-bid 11 mg/kg, PO,bid (dogs) or sid-bid (cats) |
| Sodium carbenicillin | 10-20 mg/kg, IV or IM, bid- tid |
| Potassium clavulanate:amoxicillin (1:4) | 10-20 mg/kg (amoxicillin) and 2.5-5 mg/kg (clavulanate), PO, bid |
| Probenecid (prolongs blood levels of penicillins that have short plasma half-lives or that are costly) | 1-2 mg/1,000 IU penicillin G (dogs), PO, qid |
| Amoxicillin-clavulanic acid | 10-20 mg/kg, PO, bid- tid |
| Imepenem | 1-7 mg/kg, IV or IM, tid- qid |
| Ticarcillin | 15-110 mg/kg, IM or IV, every 4-8 hr |
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