PubMed · 10393011
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N N Chan. 1999-06-26. Thyroid function in hyperemesis gravidarum.. https://doi.org/10.1016/s0140-6736(05)76292-9
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The stability of propylthiouracil in two extemporaneously prepared suspensions at 4 and 25 degrees C was studied. Commercially available 50-mg propylthiouracil tablets were used to prepare suspensions in 1:1 Ora-Sweet:Ora-Plus and in 1:1 1% methylcellulose:Simple Syrup, NF, to yield a propylthiouracil concentration of 5 mg/mL. Each suspension was stored in 10 amber plastic prescription bottles, 5 of them at 4 degrees C and the other 5 at 25 degrees C. Three samples were taken from each bottle at 0, 7, 14, 28, 42, 56, 70, and 91 days for assay by stability-indicating high-performance liquid chromatography. More than 90% of the initial propylthiouracil concentration was retained in both suspensions for 70 days at 25 degrees C and for 91 days at 4 degrees C. There were no changes in physical appearance, color, or odor, and the pH remained essentially unchanged. Propylthiouracil 5 mg/mL in two extemporaneously prepared oral suspensions was stable for at least 70 days at 25 degrees C and for at least 91 days at 4 degrees C.
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