Can cetirizine 'tighten' your private parts? What experts say
Social media users have been sharing unverified advice claiming that the common allergy pill cetirizine can reduce vaginal lubrication to create a false sense of tightness during sex.
A medicine commonly used to treat allergies has become a topic of conversation on social media, raising questions about the safety of using drugs for purposes other than those for which they were intended.
Cetirizine, an antihistamine used to treat conditions such as allergic rhinitis, itchy eyes, and skin rashes, has been discussed online as a means of reducing vaginal lubrication during sex.
Some social media users claim that taking the tablets can make the female reproductive organs drier and enhance intimacy experiences or serve purposes unrelated to their intended use.
Female organ lubrication is a natural response that helps prevent discomfort. While hormonal changes can affect lubrication, experts say there is no need to interfere with this process in pursuit of a false sense of tightness.
The Pharmacy and Poisons Board cautions against using cetirizine for purposes other than treating allergies, warning that taking medicines for unapproved uses can expose people to unnecessary risks.
Many antihistamines can be bought from a chemist or drugstore without a prescription. Examples include chlorphenamine maleate, loratadine and cetirizine.
Dr Wilfred Ochieng’, director of pharmacy practice at the Pharmacy and Poisons Board (PPB), says that vaginal dryness is not listed among cetirizine's recognised adverse effects.
“Vaginal dryness has not been listed as one of the adverse effects. Neither has it been reported to the pharmacovigilance system,” he says.
He says the documented possible side effects of the drug include dry mouth, dry eyes, and reduced mucus or secretions.
“The possible side effects listed are things like dry mouth, dry eyes and reduced mucus or secretions. Some people may even have difficulty urinating if they are susceptible,” he says.
He cautions against assuming that, just because a medicine can cause dryness in one part of the body, it can be deliberately used to produce the same effect elsewhere.
“You cannot conclude that the side effects, such as dry mouth, are sufficient to make it a product for the purpose of causing dryness,” he says.
Dr Ochieng’ notes that medicines are monitored after approval and that new safety concerns can be assessed when reports are received.
“That is what pharmacovigilance is all about. It involves monitoring medications after they have been approved for use,” he says.
As unverified health advice increasingly circulates through social media, these claims about everyday medicines and quick fixes are gaining traction, sometimes encouraging people to experiment in ways that can do more harm than good.
Dr Richard Mogeni, a gynaecologist, explains how antihistamines could affect the body's natural lubrication.
He says that antihistamines such as cetirizine may interfere with vaginal secretions due to the way they work. However, this would be an unintended side effect rather than the intended purpose of the medication.
More women are turning to vaginoplasty, surgery to reconstruct or tighten the vagina.
He explains that vaginal lubrication involves glands along the vaginal wall, including the Bartholin’s and cervical glands, which produce fluids during intimacy.
This process is influenced by signals from the brain and nervous system during stimulation.
The fluid reduces friction, making intimacy less uncomfortable or painful.
“It is that lubrication that enables entry. Without it, there would be a huge problem,” he says.
Dr Mogeni says that antihistamines work by blocking histamine, a substance involved in allergic reactions. In doing so, they can reduce secretions in some bodily membranes.
“Histamine causes reactions in various glands, leading to the production of mucus,” he says.
He adds that blocking histamine can cause dryness in some membranes, potentially including those in the vagina.
“It helps to keep your membranes dry by preventing that reaction. If histamine is blocked, it can cause dryness of the membranes, including the vaginal membranes,” he says.
However, while this explanation points to a possible biological mechanism, this has not yet been confirmed in women who use the medicine.
Warning
For women, deliberately reducing lubrication, the doctor says consequences can go beyond discomfort.
“When there is inadequate lubrication, friction during sex can lead to soreness and irritation, and in some cases, small tears in the delicate vaginal tissue. Such injuries can make intercourse painful and increase the risk of infection,” says Dr Ochieng’.
He adds that the idea that dryness makes the vagina physically tighter is also misleading.
“Lubrication reduces friction; it does not determine the strength of the pelvic floor muscles or the size of the vaginal opening,” he says.
The concern also extends beyond cetirizine to other medicines and products that people use to enhance their sex lives.
In November 2023, the PPB warned the public against a product called ‘Asali ya Wazee’, which was promoted as a natural herbal remedy for sexual enhancement.
The Board said that laboratory tests had detected high levels of sildenafil, a prescription-only drug used to treat erectile dysfunction. It warned that excessive consumption of this ingredient poses serious health risks, and cautioned against using, selling or distributing the product.
This followed an earlier warning by the Pharmaceutical Society of Kenya in January 2021 against using sildenafil, tadalafil, vardenafil and avanafil without a medical assessment and valid prescription.
These medicines, often referred to as “blue pills”, are used to treat erectile dysfunction. They are not general libido boosters and should not be taken without appropriate medical advice.
Dr Ochieng’ warns that medicines are developed and authorised for specific therapeutic purposes. Using them for other purposes without professional guidance can expose people to unnecessary medication and inappropriate doses.
“Medicines are developed and authorised for specific therapeutic purposes based on established evidence of quality, safety, and efficacy,” he says.
“If you decide to use them for other purposes, who determines the dosage you should use? Is this the optimum dosage to achieve the desired effect?”
Suspected side effects
He adds that taking more than the recommended dose in pursuit of an unproven effect can lead to an overdose.
“You may exceed the prescribed dosage. You may actually overdose. You may be taking unnecessary medication,” he says.
However, he says that there are side effects that may end up being useful. “For example, when Viagra was initially developed for a certain purpose, it was discovered that it had this other effect due to its mechanism of action,” he says.
He adds that this example should not be taken to mean that people can experiment with medicines to discover new uses for themselves. Any new effect needs to be studied, and its safety needs to be established.
“My advice is that people should not take advice from social media. They should consult professionals who are trained to understand how these things work and can provide appropriate guidance,” he says.
The Board says that members of the public can report suspected adverse drug reactions and suspicious health products through its Pharmacovigilance Electronic Reporting System (PVERS), which is available on Google Play and the App Store.
“Such reports help regulators to monitor medicines after they have been approved and to investigate possible safety concerns,” says Dr Ochieng’.
Follow our WhatsApp channel for breaking news updates and more stories like this.
