Drug & supplement interaction

Methasterone + Asfotase Alfa

Asfotase Alfa brand name: Strensiq.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Methasterone and Asfotase Alfa in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.

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Interaction report

Methasterone and Asfotase Alfa

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Asfotase Alfa and Methasterone in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for Methasterone at all — not against Asfotase Alfa, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Methasterone safety at a glance

Methasterone overall Avoid Methasterone is a controlled anabolic steroid linked to serious liver injury and is not a legitimate dietary supplement.
Pregnancy Possibly Unsafe When used orally. Anabolic androgenic steroids can disrupt the body's hormonal balance and cause various adverse effects including reduced fertility, hair loss,... Read the full pregnancy detail
Breastfeeding Possibly Unsafe When used orally. Anabolic androgenic steroids can disrupt the body's hormonal balance and cause various adverse effects including reduced fertility, hair loss,... Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Asfotase Alfa and Methasterone? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Asfotase Alfa’s Own FDA Label Lists

This is not an interaction — none of it involves Methasterone. These are the most notable effects listed in the ADVERSE REACTIONS section of Asfotase Alfa’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 5 of them are worth acting on rather than waiting out — marked below.

  • A severe allergic reaction Worth acting on
  • Hives Worth acting on
  • Liver problems Worth acting on
  • Bleeding or bruising Worth acting on
  • An allergic reaction Worth acting on
  • Mood changes or irritability
  • Chills
  • Flushing
  • Fever
  • Itching

Showing the 10 most notable of 15 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Asfotase Alfa. Read the label on DailyMed › Where a percentage is shown, it is the share of 9,959 voluntary FDA FAERS reports for Asfotase Alfa that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Methasterone’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Methasterone side to compare — that is a limit of the record, not a statement that Methasterone has no side effects.

Special populations

Methasterone in Pregnancy & Breastfeeding

Pregnancy And Lactation Possibly Unsafe

When used orally. Anabolic androgenic steroids can disrupt the body's hormonal balance and cause various adverse effects including reduced fertility, hair loss, acne, and behavioral changes. Anabolic androgenic steroid use has also been associated with hepatotoxicity and increased risk for heart disease. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing anabolic steroids are dangerous. Avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

How much people look this up

Where Methasterone and Asfotase Alfa Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Methasterone
Top half

#605 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Asfotase Alfa
Steady interest

#1,646 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Methasterone reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Methasterone and Asfotase Alfa records this page draws on were last updated June 22, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Methasterone

What is Methasterone?

  • Muscle building
  • Athletic performance
  • Strength gains
  • Body recomposition

Methasterone (also called methyldrostanolone or 'Superdrol') is a synthetic, oral anabolic steroid — not a dietary supplement, herb, or natural product. It is a controlled substance in the United States and has been linked to serious liver damage and other harms, so it should not be used outside of legitimate medical or research settings.

Synthetic compound (not derived from a plant) · Oral capsules or tablets (illicit/gray-market products)

An interaction check asks whether these two react with each other — it does not ask whether Methasterone is a good idea for someone in your situation. Here is what our Methasterone record says about it on its own.

Methasterone: dosing

There is no safe or medically established dose for methasterone. It is not an approved medicine or legitimate supplement, and we will not provide dosing guidance for it.Because of its serious risks and its status as a controlled substance, the safest amount is none.

From our Methasterone monograph — the full record covers uses, side effects and every documented interaction.

Read the full Methasterone monograph & all interactions
Medication

About Asfotase Alfa

What Is Asfotase Alfa Used For?

Brand name: Strensiq

Strensiq (asfotase alfa), given as a subcutaneous injection, is approved to treat perinatal/infantile-onset and juvenile-onset hypophosphatasia (HPP) — a rare genetic disorder in which the body lacks enough of an enzyme called TNSALP, leading to problems with bone mineralization, rickets, bone deformity, and muscle weakness.

HPP can present at birth or in childhood. Strensiq is the specific brand approved for these forms of the disease. Safety and effectiveness have been established in pediatric patients across both onset types.

Most-Reported Side Effects for Asfotase Alfa

From FAERS, the FDA’s public side-effect reporting system (9,959 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Injection site pain 1,327 reports
Fatigue 952 reports
Injection site erythema 869 reports
Injection site reaction 747 reports
Arthralgia 665 reports
See full Asfotase Alfa drug information
Keep checking

Other Drugs & Methasterone

Browse every other medication we’ve checked against Methasterone — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Methasterone against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Methasterone list.

See the full Methasterone interactions page
See every supplement checked against Asfotase Alfa, ranked by severity
Evidence & sources

Methasterone References

The 1 references that drive our Methasterone monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Methasterone and Asfotase Alfa Together: Common Questions

Is it safe to take Methasterone with Asfotase Alfa?
We do not list a known interaction between Methasterone and Asfotase Alfa. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Methasterone monograph Uses, safety profile, and every drug interaction in one place Asfotase Alfa drug information The full plain-English guide to this medication Asfotase Alfa supplement interactions Every supplement checked against Asfotase Alfa, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Asfotase Alfa and Methasterone?

Our pharmacists answer your medication & supplement questions — free.

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.