Thinking about starting Testosterone Replacement Therapy (TRT)? Here are the most important questions to ask your doctor before you begin. Having an open and honest talk with your doctor will help you understand the benefits, risks, and what TRT could mean for your health. This way, you can make the best decision for your body and your future.
Testosterone is a hormone that plays a big role in your energy, mood, muscles, bones, and sex drive. When levels drop too low, a condition called testosterone deficiency or hypogonadism, people can feel tired, weak, and less motivated. In these cases, TRT can help. Research has shown that TRT can improve bone strength, mood, and overall well-being in men with low levels of testosterone (British Society for Sexual Medicine, 2023).
But TRT is not risk-free. Doctors warn that it can sometimes cause problems such as thickened blood (which raises the risk of blood clots), acne, changes in mood, or sleep apnoea. It can also affect the prostate and reduce fertility by lowering sperm production (NHS, 2022). Because of this, experts recommend regular blood tests and health checks while on treatment.
This article lists some questions you should ask your doctor and their expert answers. However, since each TRT case is different, we suggest getting specific answers from your doctor.
Before starting testosterone replacement therapy (TRT), it’s essential to understand what it actually does, how doctors decide if you need it, and what the possible upsides and downsides are. This knowledge helps you go into your doctor’s office ready to ask the right questions.
You don’t just “start” TRT after one blood test. Doctors usually do a full check first. This might include:
These steps help confirm whether your testosterone levels are really low and if TRT is the proper treatment for you. According to the British Society for Sexual Medicine, guidelines suggest a precise diagnosis before starting therapy.
When appropriately used in people with low testosterone, TRT can bring some big benefits:
For example, studies have shown that men with testosterone deficiency who take TRT can see improvements in both muscle mass and bone strength over time.
Like any medical treatment, TRT also has side effects. These can include:
Some studies suggest TRT does not increase short-term heart risk if appropriately monitored, but the long-term safety is still being studied (Harvard Health, 2023). This is why ongoing blood tests and check-ups are essential.
Low testosterone (often called “low T”) happens when your body doesn’t produce enough of the hormone testosterone. This hormone is key for male development and health—it deepens the voice, stimulates facial and body hair growth, builds muscle mass and bone strength, and helps regulate mood, energy, and sex drive.
Low T can develop for a few different reasons:
If your testosterone is low, your doctor will likely order blood tests to pinpoint the cause and recommend treatment options.
The most common treatment for low testosterone is testosterone replacement therapy (TRT). This approach helps restore testosterone levels to a healthy range, often improving energy, mood, muscle mass, bone health, and sexual function.
TRT can be given in several forms, including:
Millions of men worldwide use TRT, and it has become a widely recognised option for managing low T symptoms.
However, TRT isn’t the only answer. The best treatment depends on the underlying cause of your low testosterone. For example:
Method |
Pros |
Cons / Important Concerns |
Injections |
Reliable dosing; longer intervals |
Can cause POME (rare lung reactions); needles. |
Gels / Patches |
Non-invasive, easy application |
Risk of transferring to others; inconsistent dosing. |
Pellets |
Low-maintenance, long-lasting (every 3 months) |
Minor procedure required; removal/replacement needed. |
Your doctor will help determine whether TRT or another approach is the safest and most effective option for you.
Testosterone replacement therapy (TRT) is available in several forms, and the best option depends on your lifestyle, preferences, and health needs.
Test/Marker |
Why It Matters |
Typical Timing |
Testosterone (AM levels) |
Confirms diagnosis and guides dosage |
Baseline, every few months |
PSA |
Monitors prostate health and cancer risk |
Baseline, then at intervals |
Hematocrit / Haemoglobin |
Tracks polycythemia risk |
Baseline, periodic checks |
Liver Function |
Ensures hormone processing and safety |
Baseline, if indicated |
Lipid Profile |
TRT can affect cholesterol levels |
Baseline, periodic checks |
Cardiovascular markers |
Monitors heart health, especially in higher-risk individuals |
As advised by your doctor |
Standard TRT methods include:
Each method can effectively raise testosterone levels, but they differ in convenience, cost, and side effects. For instance, gels may be easy to use but can sometimes transfer to others through skin contact, while injections typically last longer but may cause fluctuations in hormone levels. Some research suggests injections may have fewer cardiovascular side effects compared to gels or patches, but findings are still being studied.
The right choice isn’t one-size-fits-all. Talk with your doctor about the pros and cons of each method so you can find the treatment that fits your health, lifestyle, and comfort.
Your TRT dose isn’t one-size-fits-all—it’s personalised to your needs. Your doctor will consider several factors, including:
Once you begin treatment, your doctor will monitor your response through regular blood tests and symptom check-ins. Based on how your body reacts, your dose may be adjusted to keep your testosterone within a healthy range while minimising side effects.
Yes. Ongoing monitoring is an essential part of testosterone replacement therapy (TRT) to make sure the treatment is safe and effective.
Typical follow-up schedule:
Monitoring plans can vary depending on your doctor and clinic, so it’s essential to ask your provider about their monitoring schedule and recommended tests.
Like any medical treatment, testosterone replacement therapy (TRT) can have risks and side effects. Not everyone experiences them, but it’s essential to be aware.
Possible side effects include:
Because TRT can affect multiple systems in the body, doctors run a series of tests before starting treatment to make sure it’s safe for you.
TRT is usually not recommended for men with:
Being open with your doctor about your medical history is key. Together, you can weigh the benefits against the risks and decide if TRT is the right option for you.
Yes. In some cases, lifestyle changes can help raise testosterone levels, especially if your low T is linked to factors like excess weight, poor sleep, or stress. While these methods don’t work for everyone, they can improve overall health and may support healthy testosterone production.
Natural strategies that may help include:
These approaches are generally safe and beneficial, even if they don’t dramatically raise testosterone. Your doctor can guide you on whether lifestyle changes alone are enough or if medical treatment is needed.
Sometimes the smaller, practical questions are just as important as the big medical ones. Here are seven more things worth asking your doctor before beginning testosterone replacement therapy.
Most men start to feel a difference in energy, mood, or sex drive within a few weeks, but changes in muscle strength and bone health may take several months. Improvements usually build up slowly, so patience is essential.
Certain drugs, such as blood thinners or steroids, may interact with TRT. Always share your complete medication list so your doctor can check for possible risks or changes in dosage.
The cost depends on the method; gels and patches are often more expensive than injections. Since TRT can be a lifelong treatment, ask about both NHS availability and private pricing so you know what to expect.
Yes. While TRT can help with symptoms, it works best when combined with exercise, a balanced diet, good sleep, and reduced stress. Lifestyle changes may also allow for lower doses of testosterone.
Low testosterone is linked with low mood, irritability, and brain fog. Some men report feeling clearer and more positive on TRT, but it is not a replacement for counselling or treatment if you have depression or anxiety.
Missing a dose may cause testosterone levels to dip, leading to symptoms. If you travel often, ask about practical options like long-lasting injections or pellets that require less frequent dosing.
Moderate drinking is usually safe, but heavy alcohol use can harm the liver and lower testosterone further. Your doctor may suggest keeping alcohol within recommended limits to get the best results from TRT.
If your first testosterone replacement therapy (TRT) appointment is coming up, it’s normal to feel unsure about what to expect. Being well prepared will help you get the most out of your consultation and make confident decisions about your health. Here are some valuable tips:
Question |
Why It Matters |
What is the cause of my low testosterone? |
Helps determine if TRT is essential, or if lifestyle changes such as weight loss, better sleep, or reducing stress could improve your levels first. |
What TRT method do you recommend for me? |
Ensures the treatment fits your lifestyle, preferences, and medical history. For example, injections may suit some people, while gels are easier for others. |
What side effects should I expect? |
Sets realistic expectations so you are not surprised by potential side effects such as acne, mood shifts, or reduced fertility. Early awareness makes it easier to manage symptoms. |
Will TRT affect my fertility? |
Very important if you plan to have children, as TRT can lower sperm count. Your doctor may suggest sperm banking or alternative treatments. |
How often will I need blood tests? |
Monitoring is crucial for safe treatment, especially early on. Blood tests check testosterone levels, prostate health, and blood thickness to prevent risks. |
Can I stop TRT later if needed? |
TRT is often long-term. Understanding the risks of stopping (such as low testosterone symptoms returning) helps you prepare for future decisions. |
Testosterone replacement therapy is a long-term treatment that you might need for the rest of your life to keep your testosterone levels normal. So, it's important to ask your doctor all your questions and clear up any confusion. This will help you feel more confident and sure about your decision.