British doctors urge antibiotic leaflets to warn of allergic reactions from sexual contact. A woman had a severe reaction after her partner's semen contained amoxicillin.
Allergic reactions from antibiotic exposure
British doctors are urging that the risk of allergic reactions from exposure to antibiotics through sexual contact be included in medication leaflets. This comes after several reported cases, including one where a woman had a severe allergic reaction after coming into contact with her partner's semen, who had recently taken antibiotics.Incident details and medical response
The incident occurred six hours after the partner took amoxicillin, and the woman showed early symptoms of anaphylaxis five minutes after ejaculation. She was treated by emergency services and released six hours later. Medical staff were reportedly unaware that exposure to amoxicillin through semen was possible and initially assumed she had ingested the medication.Confirmation of allergy and research findings
Dr. Cassim Akhoon from King's College Hospital in London noted that the woman's doctor had previously assured her she was not at risk. A year after the incident, Akhoon and his colleagues confirmed her allergy to amoxicillin through a skin test and published their findings in the BMJ Journal. They concluded that exposure through semen was the most likely cause.Call for updated medication information
The team of doctors believes the evidence of this transmission risk is strong enough to warrant inclusion in patient information leaflets. They have submitted their findings to the UK Medicines and Healthcare Products Regulatory Agency, which will decide if an update is necessary.How antibiotics can be transmitted
Antibiotics like amoxicillin can enter the bloodstream and reach the prostate and seminal vesicles, which produce most of the seminal fluid. Studies show amoxicillin is excreted in urine, suggesting it can remain in the urethra until eliminated during ejaculation. Similar cases have been reported, including one involving a woman who had an allergic reaction during oral sex.Prevalence and rarity of such reactions
About 1% of the population is allergic to penicillins, but anaphylactic reactions from exposure to these medications remain extremely rare. Doctors emphasize the importance of raising awareness despite the low likelihood of such incidents.
