Question 1

Is benzathine penicillin given intravenously?

Accepted Answer

No. Benzathine penicillin G is a deep intramuscular injection. Intravenous penicillin is a different formulation used in hospital for conditions such as neurosyphilis.

Question 2

Can I inject it at home?

Accepted Answer

No. Self-injection is unsafe. Severe allergic reactions, nerve or muscle injury, infection and incorrect technique are real risks. It must be given by a qualified professional.

Question 3

How painful is the injection?

Accepted Answer

Most people feel a deep ache or soreness for a day or two. A clinician can advise on pain relief and when to seek review for severe pain or swelling.

Question 4

Can I drink alcohol after the injection?

Accepted Answer

There is no specific interaction with benzathine penicillin, but follow the treating clinician's advice, especially if you are also taking other medicines.

Question 5

What should I do if I miss a dose?

Accepted Answer

Contact the clinic. The schedule for late latent syphilis involves weekly doses, and the timing matters. Do not rearrange or repeat doses yourself.

Question 6

Does it work for other infections?

Accepted Answer

It is used for syphilis, rheumatic fever prevention and some streptococcal infections. It is not a general antibiotic for colds, flu or all infections.