This is an over the counter product - it does not require prescription.Fish Pen Forte (Penicillin 500mg)
Fish Pen (Penicillin) exerts a bactericidal action on gram-positive and some gram-negative
bacteria. Penicillin is a broad spectrum antibiotic. It is effective against a
number of pathogenic bacteria associated with ornamental fish diseases. Can use
for pop-eyes, infected eyes, fin or tail rot, gill disease, columnaris disease,
and skin ulcerations.
Dosage & Administration
Add one tablet (500 mg) into aquarium for each 10 gallons of water to be treated.
Repeat in 24 hours. It is suggested that a partial water change be made between
treatments. While duration of treatment depends on type and severity of the
infection, it is recommended that extended baths in the medication continue
for a minimum of 5 days & for not more than 10 days. Discontinue treatment
with this medication if no improvement is noted within 5 days.
Dogs and Cats: 10 mg/Kg (5 mg/lb) every 8 hours orally. Fish Pen is
commonly given in off-label use to small animals. Use with caution in animals
allergic to penicillin-like drugs.
Effective against susceptible gram-positive bacteria and anaerobes.
Keep out of reach of children. For aquarium use only. Intended for ornamental
fish and/or ornamental organisms, and not intended for use with fish for human
consumption. For those allergic to penicillin, do not put hand in tank for three
days after treatment.
250 mg Penicillin
Store at controlled room temperature of 59°-86°F. (15°-30°C).