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How Robitussin Can Help Build Cervical Mucus

If you are struggling to become pregnant and produce thick cervical mucus, or if you are on a fertility drug, such as Clomid, you may be surprised to learn that the active ingredient in cough syrup, such as Robitussin, may help you conceive. The theory is that guaifenesin, the expectorant found in cough syrups, thins and loosens cervical mucus the same way it does the mucus in your lungs when you are sick. Experts also believe that guaifenesin may also help men with thick semen in the same way as women. Although there is little scientific evidence that supports this claim, there is abundant anecdotal evidence of its effectiveness.

Look for a cough syrup that lists only guaifenesin as the active ingredient and avoid any that contain decongestants, as those may dry up mucus. In addition, stay away from any that contain dextromethorphan (the DM in many brands), as it may cause birth defects such as neural tube defects and cleft palate. If you have diabetes or would like to limit your sugar intake, Diabetic Tussin is safe and effective.

The recommended dose for thinning cervical mucus is two teaspoons (200 mg) taken orally three times a day. If this does not improve the consistency of your cervical mucus, you can try taking the maximum dosage listed on the label (four teaspoons four times a day). Guaifenesin is also available in pill form; however, this usually requires a doctor's prescription.

Most doctors recommend you begin taking guaifenesin about five days before you expect to ovulate and continue through the day you ovulate - a total of approximately six days if you have a regular cycle. If you have an irregular cycle, you should begin taking guaifenesin about five days before the earliest day you might ovulate. If you are taking Clomid, wait until the day after you take your last pill to begin the guaifenesin.

Be sure to drink a full glass of water with each dose of guaifenesin and continue to drink plenty of fluids throughout the day as proper hydration is essential for healthy mucus production.

There are possible side effects with guaifenesin, including diarrhea, dizziness, headache, hives, nausea and vomiting, skin rash, and stomach pain. However, these symptoms are not common.

As with any other over-the-counter medicine, talk to your doctor or reproductive specialist before taking guaifenesin to thin your cervical mucus.



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Cord Blood Registry
March of Dimes
Susan G. Komen

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