Dutasteride and Finasteride are both 5-alpha-reductase inhibitors used to treat AGA (male pattern baldness), but there are some differences in their effects and mechanisms of action. A comparison of the two is provided below.
Difference in mechanism of action
Finasteride:
It primarily inhibits the type 2 isozyme of 5-alpha-reductase.
This prevents testosterone from being converted to DHT (dihydrotestosterone) and reduces DHT levels.
Dutasteride:
Inhibits both type 1 and type 2 5-alpha-reductase.
Therefore, it suppresses DHT production more potently than finasteride.
Comparison of Effectiveness
Effects of Dutasteride:
Some studies have shown that dutasteride is more effective than finasteride.
Dutasteride is believed to reduce DHT levels more substantially, thus more potently reducing the progression of hair loss.
Several clinical trials have reported that Dutasteride users tend to increase hair density more than finasteride users.
Effects of Finasteride:
Finasteride is also very effective against AGA, and its efficacy has been proven in many clinical trials.
Finasteride reduces DHT levels by about 60-70%, whereas Dutasteride reduces them by more than 90%.
Comparison of side effects
Common side effects:
Side effects related to sexual function such as decreased libido, erectile dysfunction, and decreased semen volume have been reported.
These side effects are generally mild and often recover after the drug is discontinued.
Dutasteride Side Effects:
Because Dutasteride is more potent than finasteride, it also carries a slightly higher risk of side effects.
However, no significant clinical differences have been reported.
Precautions for use
Long-term use safety:
Although both drugs have been shown to be safe for long-term use, regular physician visits and follow-up are recommended.
Prohibited use during pregnancy:
Dutasteride and Finasteride should not be touched or taken by women, especially during pregnancy, as their use may affect the fetus.
Summary
Effects:
Dutasteride suppresses DHT more potently than finasteride, and some studies have shown it to be more effective against AGA.
Side Effects:
Both drugs have side effects related to sexual function, but Dutasteride may have a slightly higher risk of side effects.
Selection:
The choice of drug is based on the individual patient’s symptoms and the physician’s judgment. If finasteride does not provide sufficient benefit, switching to Dutasteride may be considered.
It is important to consult with a specialist to determine the best treatment option. The specialist can evaluate the patient’s specific situation and risks and recommend the best treatment.
