Testosterone Injection And Gel: Nebido, Testogel, Tostran Guide
Comprehensive guide to Nebido injections, Testogel, and Tostran for treating low testosterone levels in men effectively.
Testosterone injections like Nebido and gels such as Testogel and Tostran are effective treatments for men with low testosterone levels, known as hypogonadism. These therapies restore normal testosterone levels, alleviating symptoms like fatigue, low libido, and mood changes.
About Testosterone Injection and Gel
Testosterone is a vital hormone in men responsible for sexual development, muscle mass, bone density, and red blood cell production. Levels naturally decline with age, but significant drops due to hypogonadism require replacement therapy. Forms include long-acting injections like Nebido (testosterone undecanoate) and daily gels like Testogel (1% testosterone) and Tostran (2% testosterone).
Injections provide sustained release over 10-14 weeks, while gels offer steady daily absorption through the skin, mimicking natural production more closely than traditional injections, with fewer peaks and troughs.
When Are They Used?
These treatments are prescribed for primary or secondary hypogonadism, where the testes or pituitary gland fail to produce adequate testosterone. Symptoms include:
- Reduced sex drive and erectile dysfunction
- Fatigue and decreased energy
- Loss of muscle mass and strength
- Increased body fat
- Mood disturbances like depression
- Reduced bone density
Diagnosis involves blood tests confirming low testosterone (below 8-12 nmol/L) on two occasions, alongside symptoms.
Types of Testosterone Replacement Therapy
| Type | Examples | Dosage Frequency | Pros | Cons |
|---|---|---|---|---|
| Injection | Nebido | Every 10-14 weeks | Long-lasting, fewer administrations | Injection site pain, peaks/troughs |
| Gel | Testogel (1%), Tostran (2%) | Daily | Steady levels, easy to apply | Skin transfer risk, daily routine |
Gels like Testogel achieve steady-state levels within 24-48 hours, superior to injectables in maintaining consistent concentrations.
Before Taking Testosterone
Consult a doctor for full assessment. Inform about prostate issues, breast cancer history, heart disease, or sleep apnea. Blood tests check baseline testosterone, PSA, hematocrit, and lipids. Not suitable during pregnancy planning or breastfeeding (risk to female partners/children).
How to Use Testosterone Gel and Injection
Gels (Testogel, Tostran)
- Apply daily to clean, dry shoulders, upper arms, or abdomen (Testogel); inner thighs/arms (Tostran).
- Use 5-10g sachet/pump delivering 50-100mg testosterone.
- Allow to dry 3-5 minutes before dressing; wash hands thoroughly.
- Avoid swimming/showering for 2-6 hours post-application.
Injections (Nebido)
Administered by healthcare professional: 1000mg/4ml intramuscularly (buttock) every 10-14 weeks after loading dose.
Dosage
Gels: Start 50mg/day (5g Testogel 1% or 2.5g Tostran 2%), titrate to 100mg/day based on levels.
Nebido: 1000mg initially, then every 10 weeks; adjust to 12-14 weeks if levels stable.
Serum levels monitored 2-6 hours post-gel or mid-interval for injections.
How Long Do They Take to Work?
Improvements in libido and energy within 3-6 weeks; full effects on muscle/bone may take 3-6 months. Continue indefinitely unless contraindicated.
Common Questions About Testosterone Gel and Injections
Can testosterone gels affect others?
Yes, skin contact transfers testosterone. Cover application site, wash hands, avoid contact with women/children for 2-4 hours.
Do they increase prostate cancer risk?
Monitor PSA; no proven increase, but avoid if active cancer.
Impact on fertility?
Suppresses sperm production; not for fertility preservation.
Side-Effects
Common (>1/100):
- Skin irritation (gels less than patches)
- Acne, oily skin
- Weight gain, fluid retention
- Breast tenderness/enlargement
- Mood changes, aggression
Serious (seek help):
- Breathing issues/sleep apnea
- Prostate symptoms (pain, urination difficulty)
- Blood clots (painful swelling)
- Liver issues (jaundice)
- High red blood cells (headache, dizziness)
Gels show lower polycythemia risk than injections.
Overdose
Gel overdose causes irritability, aggression; seek medical advice. No specific antidote; monitor levels.
Interactions
- Anticoagulants (e.g., warfarin): monitor INR
- Insulin: adjust diabetes meds
- Corticosteroids: enhanced effects
- Avoid with other testosterone products
Storage
Gels: Room temperature, away from children. Injections: As per pharmacy instructions.
Further Information
Manufacturer leaflets: Nebido (Bayer), Testogel (Besins), Tostran (Ferring). Patient access schemes may apply.
Analysing your blood tests
Expect tests for testosterone, PSA, hematocrit every 3-12 months. Target mid-normal range (10-30 nmol/L).
Disclaimer
This is general information; consult healthcare professional for personalised advice. PATIENT does not endorse specific products.
Frequently Asked Questions (FAQs)
Q: How effective are testosterone gels compared to injections?
A: Gels provide steadier levels with less fluctuation than injections, improving sexual function and mood similarly.
Q: What if I miss a gel dose?
A: Apply as soon as remembered; resume normal schedule. Do not double dose.
Q: Can women use these?
A: No, contraindicated in females except specific cases under supervision.
Q: Do they cause hair loss?
A: Possible in genetically predisposed; monitor.
Q: How to discontinue?
A: Taper under medical supervision to avoid withdrawal symptoms.
References
- Safety and efficacy of testosterone gel in the treatment of male hypogonadism — NIH/PMC. 2009-11-01. https://pmc.ncbi.nlm.nih.gov/articles/PMC2785864/
- Pharmacology of testosterone replacement therapy preparations — Translational Andrology and Urology. 2015-01-01. https://tau.amegroups.org/article/view/11328/13164
- AndroGel (testosterone) gel label — FDA. 2013-01-01. https://www.accessdata.fda.gov/drugsatfda_docs/label/2013/021015s036lbl.pdf
- Testosterone therapy: Potential benefits and risks as you age — Mayo Clinic. 2023-01-01. https://www.mayoclinic.org/healthy-lifestyle/sexual-health/in-depth/testosterone-therapy/art-20045728
- Testosterone Treatments: Why, When, and How? — AAFP. 2006-05-01. https://www.aafp.org/pubs/afp/issues/2006/0501/p1591.html
- The benefits and risks of testosterone replacement therapy: a review — NIH/PMC. 2009-01-01. https://pmc.ncbi.nlm.nih.gov/articles/PMC2701485/
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