Procaine Penicillin + Benzyl Penicillin: Brands, Price & Uses in Bangladesh

Procaine Penicillin + Benzyl Penicillin is an injectable, fixed-dose combination penicillin-class antibiotic used for the treatment of moderate-to-severe bacterial infections caused by penicillin-susceptible organisms, in clinical situations where both a rapid onset of antibacterial action and sustained (depot) antibiotic blood levels are desired from a single intramuscular injection.

Established / guideline-supported uses

• Moderate-to-severe streptococcal infections susceptible to penicillin, including streptococcal pneumonia, erysipelas, cellulitis, and severe streptococcal pharyngitis/tonsillitis, when parenteral penicillin therapy is required.
• Syphilis, as a parenteral penicillin option under specialist/physician supervision, particularly where sustained tissue levels combined with an initial peak level are wanted.
• Diphtheria, as an adjunct to diphtheria antitoxin, to eradicate Corynebacterium diphtheriae and reduce the carrier state (antitoxin remains the primary life-saving treatment).
• Anthrax (cutaneous and systemic forms), as part of combination antibacterial therapy guided by a specialist, in settings where penicillin-susceptibility is confirmed or presumed.

Adjunct / combination-therapy uses

• As part of combination therapy with an aminoglycoside for selected severe susceptible infections (e.g., enterococcal or streptococcal endocarditis), under specialist supervision and local treatment protocols (the two drugs must not be mixed in the same syringe; see Interactions).

The final choice of antibiotic regimen, dose, and duration must always be individualized by the treating physician based on the site and severity of infection, culture and sensitivity results, and local antimicrobial resistance patterns.

Procaine Penicillin + Benzyl Penicillin is given only by deep intramuscular injection into a large muscle mass (e.g., the upper outer quadrant of the gluteal region), with injection sites alternated for repeated doses. It must never be given intravenously.

Dose and duration depend on the indication, its severity, and the patient's age, weight, and renal function; see the Dosage table for indication-specific guidance. Treatment is typically continued for at least 48-72 hours after the patient becomes afebrile/clinically improved, and for the full course recommended by the physician for the specific infection (e.g., 10 days or longer for streptococcal infections to reduce the risk of rheumatic fever).

Antibiotic stewardship: Take Procaine Penicillin + Benzyl Penicillin exactly as prescribed by your physician; do not stop, extend, skip doses, or share this medicine with others without medical advice, as incomplete or inappropriate use can lead to treatment failure and antibiotic resistance.

Possible side effects of Procaine Penicillin + Benzyl Penicillin include:

Common

• Pain, induration, or sterile abscess at the intramuscular injection site.
• Mild gastrointestinal upset (nausea, diarrhea).

Hypersensitivity reactions

• Skin rash, urticaria, pruritus.
• Serious allergic reactions, including anaphylaxis and angioedema, which can be life-threatening and require immediate medical attention (see Contraindications and Precautions).

Procaine-related (non-allergic) reaction

• A transient reaction sometimes called a "Hoigne syndrome" or immediate procaine-related CNS reaction can occur within seconds to minutes of injection, causing anxiety, fear, agitation, hallucinations, or seizure-like activity. This is distinct from a true allergic reaction and is thought to be related to inadvertent intravascular entry of procaine or its systemic absorption; it usually resolves within 15-30 minutes but should be evaluated by a healthcare professional and distinguished from anaphylaxis.

Less common / serious

• Clostridioides difficile-associated diarrhea/colitis, which can range from mild to severe and may occur during or after treatment.
• Jarisch-Herxheimer reaction (fever, chills, myalgia) when Procaine Penicillin + Benzyl Penicillin is used to treat spirochetal infections such as syphilis.
• Blood dyscrasias (rare) with prolonged high-dose therapy.