How to Inject Testosterone: IM vs SubQ, How Often to Inject, and How Creams Compare

A Complete Guide from Bella Lusso Aesthetic Medicine | Duncan, Greenville, Spartanburg & Upstate SC

Testosterone therapy is one of the most effective ways to restore energy, libido, mood, strength, and overall well-being for both men and women experiencing hormone imbalance. But one of the most common questions patients have is how to properly inject testosterone, how often they should dose, and whether IM (intramuscular) or SubQ (subcutaneous) injections are better.

This guide explains everything you need to know — including how injections compare to testosterone cream — so you can understand your treatment and achieve optimal results.

💉 1. How to Inject Testosterone Intramuscularly (IM)

Intramuscular testosterone injections deliver medication directly into the muscle, where it is absorbed steadily over time.

Common IM Injection Sites

• Vastus lateralis (outer thigh) — easiest for self-injection

• Gluteus medius (upper outer glute) — most common in clinics

• Deltoid (upper arm) — less common due to smaller muscle size

How to Inject IM Testosterone: Step-by-Step

1. Wash hands thoroughly.

2. Clean the injection site with an alcohol swab.

3. Use a 1–1.5 inch needle depending on muscle depth.

4. Draw up prescribed dose.

5. Insert needle at a 90-degree angle into the muscle.

6. Inject slowly to reduce soreness.

7. Remove needle and apply light pressure with gauze.

8. Rotate injection sites weekly.

Who IM Injections Are Best For

• Patients needing higher testosterone doses

• Those who prefer traditional TRT

• Individuals who have difficulty absorbing SubQ

  

🩹 2. How to Inject Testosterone Subcutaneously (SubQ)

SubQ injections deliver testosterone into the fat layer under the skin. Many patients find this method less painful, easier, and more consistent.

Common SubQ Injection Sites

• Lower abdomen (2 inches away from the navel)

• Love handle area

• Outer thigh

• Upper gluteal fat pad

How to Inject SubQ Testosterone: Step-by-Step

1. Wash hands and clean the area with alcohol.

2. Use a small 27–30 gauge insulin needle (½ inch).

3. Pinch 1–2 inches of fat.

4. Insert needle at a 45–90-degree angle.

5. Inject slowly and evenly.

6. Withdraw needle and gently apply pressure.

7. Rotate sites to prevent irritation.

Who SubQ Injections Are Best For

• Patients who prefer at-home injections

• Those wanting smoother, more stable hormone levels

• Individuals prone to post-injection soreness

SubQ testosterone is increasingly popular because it’s simple, effective, and well tolerated.

🕒 3. How Often Should You Inject Testosterone?

At Bella Lusso, we recommend injecting at least twice weekly, regardless of whether you use IM or SubQ.

Why Twice Weekly Is Best

Injecting testosterone once per week causes large peaks and valleys, leading to:

• Mood swings

• Irritability

• Fatigue

• Water retention

• Acne

• Estrogen fluctuations

• Inconsistent libido

Splitting the dose into two or more smaller injections prevents these swings and maintains smoother levels.

Common Dosing Schedules

• Twice weekly (most common): e.g., Monday/Thursday

• Three times weekly (for very stable levels)

• Every other day (micro-dosing approach)

More frequent injections = more stable hormone levels = better symptom control.

⚖️ 4. IM vs SubQ: How Do Testosterone Levels Compare?

Feature	IM Testosterone	SubQ Testosterone
Absorption	Slight peak, then gradual decline	Very stable levels
Pain Level	More discomfort (bigger needle)	Minimal discomfort
Dose Needed	Sometimes requires higher dose	Often effective at lower doses
Side Effects	Higher risk of mood swings / estrogen spikes	Fewer fluctuations
Convenience	Harder to self-inject	Easy for at-home use
Injection Frequency	Best 2x weekly	Best 2–3x weekly

Clinical note: Many patients report better symptom stability and fewer estrogen-related side effects with SubQ injections.

🧴 5. Testosterone Cream vs Injections

While topical testosterone cream is an option, it works very differently than injections.

⭐ Advantages of Testosterone Cream

• No needles

• Daily use

• Good for patients sensitive to injections

• Minimal lipid involvement

❗ Drawbacks of Testosterone Cream

• Inconsistent absorption (varies by skin thickness, sweating, showering, clothing)

• Risk of transfer to partners, children, or pets

• Often requires higher doses

• Can cause skin irritation

• Peaks quickly and drops within hours

🔍 Which Works Better?

Injections provide more consistent, predictable levels than cream.For most patients, injections (IM or SubQ) produce:

• More stable energy

• Better libido

• Improved mood

• More consistent symptom relief

Cream is useful in limited situations, but injections remain the gold standard.

⭐ Frequently Asked Questions (FAQ)

1. Is SubQ testosterone as effective as IM testosterone?

Yes. Modern studies show that SubQ testosterone provides stable and therapeutic levels comparable to IM — often with fewer side effects.

2. Can I switch from IM to SubQ?

Absolutely. Many patients switch after realizing SubQ is more comfortable and stable. Your provider will guide dosing adjustments.

3. What needle size is best for SubQ injections?

A 27–30 gauge, ½-inch needle is ideal for easy, less painful administration.

4. Why shouldn’t I inject testosterone once a week?

Weekly injections cause hormone peaks and crashes, leading to mood swings, fatigue, and estrogen spikes. Twice weekly keeps levels stable.

5. Do testosterone injections hurt?

SubQ injections are typically painless. IM injections may cause mild soreness for some patients.

6. Does testosterone cream work as well as injections?

Cream works, but its absorption is inconsistent. Most patients experience better symptom improvement with injections.

7. How long does it take to feel results?

Most patients notice improvements within 2–6 weeks, with full optimization around 8–12 weeks.

8. Can women use testosterone therapy?

Yes. Women benefit from low-dose testosterone for energy, libido, mood, and muscle tone.

9. What if I notice side effects?

Contact the clinic immediately. Adjusting dose, frequency, or method often resolves issues.

10. How do I start testosterone therapy at Bella Lusso?

Schedule your consultation here:👉 https://www.bellalussoaesthetics.com/book-online