They are powders, are mixed with water, and administered orally. It is indicated also for use against E. coli and salmonella infections, and the recommended dose in drinking water is 10 mg per pound of body weight for swine, daily for up to 14 days. Penicillin G Procaine is another broad spectrum antibiotic used for treatment of common diseases, such as gonorrhea, anthrax, diphtheria, listeria, etc. Some people have allergic reactions to penicillin, others to procaine. Try to avoid administering penicillin to those with a known allergic reaction.
Antihistamines are helpful for treatment of procaine reactions.
The choice is yours. No medical recommendations or advice can be given for obvious legal reasons. Those choosing to stockpile veterinary medicines, such as OxyTet or Combiotic, will find not dosages given or rated for humans. Fortunately, swine reportedly have a similar physiological reaction to humans with broad spectrum antibiotics, their weights are similar, and recommended dosages by weight for swine are listed on every bottle of veterinary antibiotics. By some ironic twist of fate, some humans are also called swine, but treatment may reasonably be withheld for religious, personal or ethical reasons.