When you go to the doctor for a medical condition, you often put your faith in the medical professional to diagnose and prescribe you the right medication for your ailment. Sometimes, you might have done research before your appointment so you have an idea of what you might be prescribed, but most of the time, it's up to the doctor to make that call for us.

Doctors have a code they must follow when they prescribe medicines, but there are often several options to choose from depending on your symptoms, any other medications you might be taking, and their own professional opinions. And one GP based in the UK has shared three medicines he'll never prescribe to his patients - as he doesn't believe they're effective enough when compared to alternatives.

Now doctor Asif Ahmed shared a video on TikTok in which he listed the three medicines he doesn't like prescribing to his patients, and offered alternative options that he much prefers to try first.

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He said: "These medications either don't work very well, have too many side effects, or there's a better alternative."

Gabapentin is an anticonvulsant medication that is primarily used to treat nerve pain from conditions like shingles and diabetes, as well as to help control seizures in epilepsy by reducing the abnormal electrical activity in the brain.

However, Dr Ahmed said he wouldn't usually prescribe it for pain relief, as he doesn't believe it's particularly effective. He did not mention epilepsy, however, and only stated he wouldn't prescribe it for pain.

He said: "The issue I have with gabapentin is there's no real evidence that it actually works that well for pain, and even when it does work, the doses you need are so high. Most of the time, people stay on it for many years, get the dose increased every few months, and all it does is make them sleepy, cause confusion, and reduce their memory."

The NHS website states it's "thought" gabapentin can block pain by affecting the pain messages travelling through the brain and down the spine, but it does not mention a lack of evidence into its efficiency.

It also states that most people who take gabapentin won't have any side effects, although it does list tiredness and dizziness as possible side effects which some users may experience.

You may be prescribed citalopram if you have depression, as it is a selective serotonin reuptake inhibitor (SSRI). It can also be prescribed for people who have panic attacks, and the NHS states that it has fewer side effects than some older antidepressants.

Dr Ahmed says he doesn't have an issue with citalopram, but he believes there is another medication that is more effective, so he would always try and prescribe that instead.

He said: "I don't particularly have a huge issue with citalopram. The thing is, there's a far better alternative called escitalopram, which studies have shown works far better to treat depression, and I have found this in my own clinical practice."

The last medication Dr Ahmed refuses to prescribe to his patients is sumatriptan, which is commonly used to treat migraines and cluster headaches. While it's not fully understood what causes migraines, it's believed to be a temporary widening of the blood vessels in your brain, and sumatriptan works by narrowing these blood vessels again.

The doctor said: "My choice over sumatriptan for migraines would be something called zolmitriptan, and that's because you need a lower dose, it's far more effective, and it can be used for migraines caused during periods."

Always consult your doctor before starting any new medication, and for more information on various health conditions and their treatments, visit the NHS website.