Be aware of this risk when you mix painkillers and the Pill


By AGENCY

Common drugs used to relieve pain and fever, as well as to reduce inflammation, can cause a small increased risk of blood clots when taken with the Pill, research has found. — dpa

Taking common painkillers while on the Pill may lead to a small increased risk of blood clots, research suggests.

Experts said that while the risk is low, women should be informed of the link between non-steroidal anti-inflammatory drugs (NSAIDs) and hormonal contraception.

NSAIDs are widely used to relieve pain, fever and to reduce inflammation.

Examples of such drugs include ibuprofen, naproxen, diclofenac, celecoxib, mefenamic acid, etoricoxib and indomethacin.

The Danish study, published in The BMJ, included data for more than two million women aged 15 to 49, who lived in Denmark between 1996 and 2017.

It found that the risk was greater in women using ibuprofen, diclofenac and naproxen, while on combined pills containing progesterone and oestrogen, but was smaller in women using progestogen-only pills (often called the mini Pill), implants and coils.

The researchers used national medical records to track diagnoses of venous thromboembolism (blood clots) among the women, who had no history of blood clots, cancer, hysterectomy (surgery to remove the womb) or fertility treatment.

Hormonal contraception was divided into high, medium and low risk, according to their links with clots in previous studies.

The researchers said high-risk hormonal contraception included combined pills containing either 50 microgrammes oestrogen, or third or fourth generation progestogen, while medium risk included all other combined oral contraceptives.

Low or no risk included the mini Pill, implants and coils.

The study found that NSAIDs were used by 529,704 women on hormonal contraception, with ibuprofen being the most frequently used NSAID (60%), followed by diclofenac (20%) and naproxen (6%).

Over an average of 10 years, 8,710 venous clots occurred (2,715 pulmonary embolisms and 5,995 deep venous thromboses or DVTs), and 228 (2.6%) women died within 30 days of diagnosis.

The study found NSAID use was associated with four extra venous thromboembolic events per week per 100,000 women not using hormonal contraception, 11 extra events in women using medium-risk hormonal contraception, and 23 extra in women using high-risk hormonal contraception.

The link was strongest for diclofenac, compared with ibuprofen and naproxen, the paper found.

The experts warned that the study did not prove a link, but said women should be given information about the risks.

They said: “Women needing both hormonal contraception and regular use of NSAIDs should be advised accordingly.”

A range of factors that could influence the results, such as age, education level, pregnancy history, prior surgery, high blood pressure and diabetes, were taken into account when analysing the findings.

“Blood clots are dangerous since they can lodge in the lungs causing breathing and heart problems.

“Contraceptive medications and painkillers like ibuprofen are essential for many women to avoid pregnancy and cope with period pain,” Imperial College London reproductive endocrinology and andrology consultant and clinical senior lecturer Dr Channa Jayasena said.

“Painkillers and the Pill (like all drugs) can occasionally cause serious side effects.

“But I don’t think this study alone should put off women taking either the Pill, painkillers or both if needed,” she said.

“The most important message should be for all women to reduce blood clot risk by smoking cessation and weight loss.” – PA Media/dpa

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