This episode centers around the drugs being used experimentally to treat COVID-19 and what we know about how these drugs impact pregnant women. The links to the studies and drug information discussed on this episode can be found at “yourfertilitypharmacist.com.”
Before delving into the drugs, let’s touch base on the limited information we have on how pregnant women are impacted by coronavirus, which is the virus manifesting as the respiratory illness called “COVID-19.”The good news is, there have not been any confirmed cases of mothers transferring coronavirus to the baby in utero. Having said that, the limited information we have about delivery outcomes is concerning. A recent article in the Journal of Infection detailed the delivery outcomes from thirteen Chinese women who were pregnant and tested + for coronavirus. They ranged in age from 22 to 36 years old. They had no other pre-existing health conditions. Two women were in their second trimesters, and the other 11 were in their third trimesters. Six of the eleven women who were in their third trimester went into early labor related to fetal distress, premature membrane rupture, and even one stillbirth. The two women who were in their second trimesters did NOT go into early labor or have any other fetal consequences noted – I really hope that the researchers keep close tabs on those two pregnancies so we can learn more information on the impact of second trimester coronavirus infections. Since a lot of these pregnancies had complications, having a treatment for COVID-19 could improve the health of infected mothers and babies.
Regarding medications to treat COVID-19, there are a few drugs that seem promising for an illness that doesn’t yet officially have a cure.
A drug that’s been receiving a TON of press lately is chloroquine, as reports from China and France suggest that it’s effective against COVID-19. Chloroquine was originally approved by the FDA in 1949 to treat malaria, and it was later approved to treat lupus and rheumatoid arthritis. Since chloroquine has been used and tested for so many decades, we have information on how this drug impacts pregnant women and their babies. Chloroquine does go through the placenta and into breastmilk; in mice and monkey babies, this crossing led to vision problems and blindness. These eye problems were not seen in human studies conducted a decade ago in Thailand and in New Guinea on pregnant moms requiring malaria prophylaxis. Thus, the reference book Drugs in Pregnancy and Lactation considers chloroquine to be the unlikely cause of birth defects in humans. It also states that the benefits of preventing and treating malaria outweigh the risks. This permission could potentially be extrapolated to treatment of COVID-19… but before getting too gung-ho about stockpiling chloroquine, a more promising sister drug to chloroquine should be considered.
Hydroxychloroquine is chloroquine with a slightly different molecular structure that makes it less toxic yet just as effective as chloroquine for malaria and for immune-mediated disorders. It was FDA approved in 1955 and also goes by the brand name Plaquenil. Scientists, and therefore the mainstream media, have gotten very excited about using this drug because of a small study from southern France on treating coronavirus. In this study, 14 infected patients received hydroxychloroquine alone, 6 patients received hydroxychloroquine plus an antibiotic called azithromycin, and 16 patients, serving as the control group, who didn’t get hydroxychloroquine at all. After six days, the virus was cleared from the system of all six patients taking both hydroxychloroquine and azithromycin, from 8 out of 14 patients taking hydroxychloroquine alone, and from just two of the sixteen patients who didn’t receive hydroxychloroquine. Those encouraging results were only published five days ago. Since then, hoarding of the medication has become a national issue. It’s such an issue that the FDA is permitting a factory in India that was recently cited for quality issues to ramp up supply of hydroxychloroquine to import to the U.S.
This study inspiring the hydroxychloroquine shortage specifically excluded pregnant women. Given that it is safe to use in pregnancy in other conditions, plus it is generally considered to be a safer drug than chloroquine, it would be reasonable to assume that it would be safe in pregnant women infected with COVID-19. Of the drugs being tested to treat COVID-19, hydroxychloroquine is the drug I feel most confident endorsing for safety and efficacy in pregnant women at this time. I’d also recommend taking it with azithromycin to increase chances of clearing the virus.
Though I’ve given my endorsement, I would be remiss as a pharmacist if I didn’t discuss another promising drug that’s gotten a lot of attention lately. It’s an antiviral called remdesivir, which is NOT officially FDA approved for any illness in the U.S. It is allowed for “compassionate use,” meaning that a patient may be able to gain access to the drug if in a life-threatening condition and there isn’t a good alternative treatment available. The manufacturer of this drug has seen such a surge in requests to use remdesivir during this pandemic that they just cut off new requests to use this drug EXCEPT for pregnant women and in children.
So, while it remains available for pregnant women, is it actually safe and effective? In 2018/2019, remdesivir was given to six pregnant Congolese women infected with Ebola who were enrolled in a clinical trial looking at four investigational drugs to potentially treat that illness.
This trial was published in Dec 2019 in the New England Journal of Medicine; unfortunately, after looking over the study and all of the published information, there is very little detail on how these six pregnant women responded to remdesivir. We don’t know their ages, how far along they were in their pregnancies, etc. One reason that the trial may have given so little focus to so few pregnant women taking remdesivir is because two other drugs in the study were found to be more effective at treating Ebola, so they stopped giving remdesivir in favor of other drugs. I gleaned the study for details and read in the supplementary index about the adverse events broken down by patient and drug. One of the other experimental drugs mentioned one baby born with hydrocephalus and one with a shortened umbilical cord. Because these adverse outcomes were mentioned in a drug that was NOT remdesivir, can we assume that remdesivir does not cause fetal harm?
We still have too little information - six pregnant women taking a drug is simply not enough to draw useful conclusions. In the short-term, we will have to look at press releases for pregnant women who took remdesivir through compassionate use. According to upcoming U.S. studies listed on clinicaltrials.gov, only one of the three remdesivir trials is specifically excluding pregnant women from participating, so hopefully we will have some concrete data once the two inclusive trials have ended. To see the studies included in this podcast, please check out “yourfertilitypharmacist.com.”