Interaction Checker

Add peptides or compounds to check all pairwise interactions, cumulative organ load, and safety flags.

This stack has significant risks: 1 interaction(s) to avoid and 1 critical warning(s). Review carefully before proceeding.
1 combination(s) marked "avoid": Finasteride + Masteron. Review these interactions carefully.

Cumulative Organ Load

Gonads
moderate
Heart
low
Skin
low
Liver
low

Shared Safety Flags

2x 2 compounds share the teratogenic safety flag (Finasteride, Masteron). Monitor accordingly.
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Finasteride + Masteron
Avoid

Finasteride inhibits 5-alpha reductase, which converts testosterone to DHT. Since Masteron is already a DHT derivative, finasteride does not reduce its androgenic potency in any tissue. Furthermore, using finasteride while on Masteron is counterproductive: it will not protect against Masteron-induced hair loss (the primary reason for taking finasteride) and may worsen the overall androgenic side effect profile by altering the androgen balance. Individuals concerned about hair loss should avoid Masteron entirely rather than attempting to mitigate it with finasteride.

Researched 95% confidence Compare

Interaction data is compiled from research literature, pharmacological analysis, and community reports. Inferred interactions are based on known mechanisms and may not reflect all real-world outcomes. Always consult a healthcare professional before combining compounds.