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Service Clinical Protocols

Clinical Protocols Reference by Specialty

Reference material for prescribers, organized by specialty. These describe frameworks used in practice and the monitoring that accompanies them — they are not treatment recommendations, and dosing remains your clinical judgement.

Scope of This Page

This is educational reference material for licensed prescribers. Newtropin is not a pharmacy and does not prescribe or recommend therapy. Every framework described requires individual patient evaluation, and availability of any specific compound depends on current FDA compounding status.

Monitoring by Category

The markers that most commonly change management, by therapeutic area.

CategoryBaselineOngoing monitoring
Testosterone therapyMorning total T ×2, SHBG or free T, LH/FSH, sensitive estradiol, prolactin, CBC, PSA (40+), CMP, lipids, HbA1cHematocrit, PSA, estradiol, symptom response
Female hormone therapyCycle-timed hormone panel, thyroid, CBC, ferritin, metabolic markersSymptom response, route-appropriate levels
GH secretagoguesIGF-1, fasting glucose, HbA1cIGF-1, glucose tolerance
GLP-1 receptor agonistsHbA1c, renal function, weight, personal/family thyroid historyWeight, HbA1c, GI tolerance, lean mass
Peptide tissue repairClinical assessment; oncological history where angiogenic compounds are consideredSymptom and functional response

Hormone Therapy

Compounded hormone preparations exist primarily to solve a fit problem: a strength unavailable commercially, a combination in one preparation, or a base that avoids an excipient a patient reacts to. Route materially changes pharmacokinetics, and serum monitoring is interpreted differently for transdermal, oral, sublingual, and pellet delivery — timing relative to the last dose matters as much as the interval since starting.

For men, the primary-versus-secondary distinction drives everything downstream, because secondary hypogonadism opens fertility-preserving options that replacement forecloses. For women, cycle phase determines whether a hormone panel is interpretable at all.

Weight Management

Incretin therapies have the strongest human outcome evidence in this category. The compounding position is the constraint rather than the clinical one: availability depends on shortage status and on whether a documented clinically significant difference applies to the individual patient.

The consideration most often missed is lean mass. Rapid incretin-driven loss includes a substantial proportion of lean tissue, which matters most in the perimenopausal and older patients who frequently present for it. Protein intake and resistance training are part of the protocol, not an afterthought.

Recovery and Tissue Repair

This category has the widest gap between enthusiasm and evidence. BPC-157 and TB-500 have substantial animal literature and almost no controlled human data, and their compounding status has moved repeatedly.

Two practical points: both have angiogenic activity to some degree, which warrants specific discussion in patients with malignancy or a recent oncological procedure; and both are prohibited in tested sport, BPC-157 by name.

Sexual Health

Desire and vascular response are separate mechanisms, and matching the agent to the failing mechanism is most of the clinical work. PDE5 inhibitors amplify a physiological response and do nothing for absent desire; PT-141 acts centrally on desire and is FDA-approved only for HSDD in premenopausal women, so use in men is off-label.

New-onset erectile dysfunction over 40 warrants cardiovascular assessment. Penile arteries are smaller than coronary arteries and frequently become symptomatic first.

FAQ

Common questions

  • Does Newtropin provide dosing recommendations?

    No. Newtropin is not a pharmacy or a clinic and does not prescribe or recommend therapy. This page is educational reference material for licensed prescribers; dosing is your clinical judgement for an individual patient.

  • What monitoring does testosterone therapy require?

    Baseline typically includes morning total testosterone confirmed twice, SHBG or free testosterone, LH, FSH, sensitive estradiol, prolactin, CBC, PSA over 40, metabolic panel, lipids and HbA1c. Hematocrit, PSA and estradiol are the markers most commonly tracked long-term.

  • How is monitoring different for compounded hormone preparations?

    Route changes pharmacokinetics, so timing relative to the last dose matters as much as the interval since starting. Transdermal, oral, sublingual and pellet delivery each produce different serum patterns and are interpreted differently.

  • Are peptide protocols evidence-based?

    It varies enormously by compound. GLP-1 receptor agonists have large controlled human trials. Most tissue-repair peptides have substantial animal data and very limited human trial evidence. Treating the category as uniform is the most common error.

  • Which compounds are currently available to compound?

    This changes as the FDA evaluates bulk drug substances for 503A use. Check the FDA peptide status tracker rather than assuming continuity from a previous prescription.

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