I'm still learning too bro, but from what I know Nolva is a SERM and Letro is an A.I. ... They work in different ways,
"Aromatase inhibitors:
AIs are categorized into two types:
Type 1: Irreversible steroidal inhibitors such as exemestane form a permanent bond with the aromatase enzyme complex.
Type 2: Non-steroidal inhibitors (such as anastrozole, letrozole) inhibit the enzyme by reversible competition.
Aromatase inhibitors work by inhibiting the action of the enzyme aromatase, which converts androgens into estrogens by a process called aromatization. By inhibiting aromatase they increase Testosterone and reduce Gynecomastia.
1. Letrozole (common brand name Femara) is a type 2 AI.
Letrozole has shown to reduce estrogen levels by 98 percent while raising testosterone levels. The anti-estrogen action of letrozole is preferred by bodybuilders for use during a steroid cycle to reduce bloating due to excess water retention and prevent the formation of gynecomastia related breast tissue that is a side effect of some anabolic steroids. Usage above 2.5 mg/day is known to potentially temporarily kill sex drive. Above 5mg/day for extended periods may cause kidney problems.
SERM (Selective Estrogen Receptor Modulaters):
Are a class of compounds that acts on the estrogen receptor. A characteristic that distinguishes these substances from pure receptor agonists and antagonists is that their action is different in various tissues, thereby granting the possibility to selectively inhibit or stimulate estrogen-like action in various tissues
1. Tamoxifen (brand name Nolvadex).
In men, tamoxifen is sometimes used to treat gynecomastia which arises for example as a side effect of antiandrogen prostate cancer treatment.Tamoxifen is also used by bodybuilders to prevent or reduce drug-induced gynecomastia caused by the estrogenic metabolites of anabolic steroids.
2. Clomifene or clomiphene (brand name Clomid)
Clomifene acts by inhibiting the action of estrogen on the gonadotrope cells in the anterior pituitary gland. In response to low estrogen levels, follicle-stimulating hormone (FSH) release is increased. Clomifene is commonly used by male anabolic steroid users to bind the estrogen receptors in their bodies, thereby blocking the effects of estrogen, i.e., gynecomastia. It also restores the body's natural production of testosterone. It is commonly used as a "recovery drug" and taken toward the end of a steroid cycle."
do more research bro but for this situation I'd use either Letro or Arimidex EOD for the next 3 weeks before starting the Nolva... should fix your situation
