Simultaneous Quantification of Dutasteride and Silodosin Using a Stability-Indicating RP-HPLC Approach

The user reported high testosterone and estradiol levels within range, but unexpectedly high DHT levels after using finasteride and dutasteride for hair loss. Another person suggested the dutasteride might be fake or a bad batch and recommended using the branded Avodart.

Dutasteride capsules were exposed to heat and humidity, causing them to soften, and the user considered replacing them with new ones from a local pharmacy. Suggestions included alternating between old and new capsules, storing them properly, and using them topically with Minoxidil, though the user decided to wait and see the effects of Dutasteride first.

The conversation discusses using Duodart (dutasteride + tamsulosin) for hair loss, with side effects like frequent urination and ejaculation issues leading to discontinuation. The user switched to German Avodart and experienced mood and erection side effects, considering adjusting the dosage to three times a week.

The half-life of Dutasteride is commonly stated as around 5 weeks, but some sources suggest it is 170 hours for men aged 20–49, with further information indicating it varies from 3 days to 5 weeks depending on the dose. The user is seeking clarity on these conflicting figures.

Maximum serum DHT suppression for finasteride occurs at 8 hours, while for dutasteride, it occurs within 1 to 2 weeks with daily dosing. Dutasteride mesotherapy will be followed by blood tests to check serum DHT changes.

Dutasteride is recommended for men on testosterone replacement therapy (TRT) with DHT-sensitive hair, as it does not interfere with TRT's anabolic effects and may improve libido and aging male symptoms. Users report varying experiences with libido when switching from finasteride to dutasteride, with some noticing improvements and others experiencing fluctuations.