Tandem Pen

Tandem Pen

Tandem Pen Recall

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Questions & Answers

Side Effects & Adverse Reactions

Beef cattle should be withheld from slaughter for food use for thirty (30) days following last treatment. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal. Treatment in beef cattle must be limited to two (2) doses.

Legal Issues

There is currently no legal information available for this drug.

FDA Safety Alerts

There are currently no FDA safety alerts available for this drug.

Manufacturer Warnings

There is currently no manufacturer warning information available for this drug.

FDA Labeling Changes

There are currently no FDA labeling changes available for this drug.


Sterile penicillin G benzathine and penicillin G procaine in aqueous suspension is indicated for treatment of the following bacterial infections in beef cattle due to penicillin-susceptible microorganisms that are susceptible to the serum levels common to this particular dosage form, such as:

  1. Bacterial Pneumonia (shipping fever complex) (Streptococcus spp., Actinomyces pyogenes, Staphylococcus aureus)
  2. Upper Respiratory Infections such as Rhinitis or Pharyngitis (Actinomyces pyogenes).
  3. Blackleg (Clostridium chauvoei).


There is currently no drug history available for this drug.

Other Information

Each mL of suspension contains 150,000 units penicillin G benzathine; 150,000 units penicillin G procaine; 11.7 mg lecithin; 1.75 mg sodium formaldehyde sulfoxylate; 1.20 mg methylparaben (as preservative); 0.14 mg propylparaben (as preservative); 8.19 mg polysorbate 40; 11.3 mg sorbitan monopalmitate; 3.98 mg sodium citrate anhydrous; 20 mg procaine hydrochloride; 1.04 mg sodium carboxymethylcellulose; and Water for Injection, q.s.

Tandem Pen Manufacturers

  • Norbrook Laboratories Limited
    Tandem Pen (Penicillin G Procaine And Penicillin G Benzathine) Injection, Suspension [Norbrook Laboratories Limited]

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