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Dr. Tania (Henriquez) McIntosh
Dentist in Langley, British Columbia

Oral Sedation - Anti-Anxiety Medication

January 21, 2016
Posted By: Tania Henriquez

Most commonly, oral sedation (usually in the form of anti-anxiety pills also known as “happy pills”) is prescribed for relieving anxiety in the hours immediately before a dental appointment. An anti-anxiety or a sleeping pill taken the night before the appointment, an hour before going to bed, can help with falling asleep and getting some rest. Alternatives include a stiff drink or stocking up on rescue remedy… but find out more below!

Anti-Anxiety Pills (Benzodiazepines or “Benzos”)

In dentistry, the most commonly prescribed drugs for (or rather against!) anxiety belong to the “benzodiazepine” family. You’ve probably heard of them by their tradenames – for example, Valium, Halcion, Xanax, or Ativan.

Benzos decrease anxiety by binding with receptors in the brain which tone down activity in those parts of the brain responsible for fear.

Travel warning!

You shouldn’t travel on your own after you’ve taken benzodiazepines in the doses mentioned here – make sure you have an escort, even if you’re walking there! It’s easy to become disorientated and miss your stop if going by bus or train, or walk straight in front of a car – or you might even forget that you’re on your way to your dentist’s (“hey cool” I hear you say :wink:)… So find someone to accompany you. And please don’t pop pills and drive!

Benzodiazepines come in two flavours:

While all benzodiazepines act as sedatives and anti-anxiety drugs, some are more targeted at brain areas which control sleep and wakefulness, while others are more specifically targeted at brain areas which control emotions such as fear. The classification of whether a benzodiazepine is sedative-hypnotic or anti-anxiety is to some extent an arbitrary one, as the boundaries are quite fluid. As a rule of thumb, in higher doses benzos act like sedatives and may promote sleep, while in lower doses, they simply reduce anxiety.

Benzodiazepines are Central Nervous System (CNS) depressants (for example, there can be a decline in blood pressure and breathing – which is good, because if your heart isn’t racing, you’ll feel calmer). They should not be mixed with other CNS depressants such as alcohol. Don’t self-medicate and stick to the dose your dentist or doctor recommends (which may be a higher dose than specified on the drug package insert. Reason being that the package inserts recommend a dose to induce sedation or sleep in a nonstress situation such as the home environment). It is possible to overdose on these things, and overdoses could lower your breathing to dangerously low levels, which could result in coma or even death.

In case this sounds scary – unless you make a deliberate attempt to overdose, it’s extremely unlikely for any dangerous symptoms to develop. The reason why benzos are so widely used is precisely because they’re safe.

People for whom benzos have worked well describe them as “working wonders”, as having a calming and relaxing effect, or as making you feel “out of it”. Giddiness, confusion and saying silly things are also common. Benzos may make you forget large parts of what happened while you were under their influence, which can be handy if you don’t want to remember very much! However, this effect is not reliable.

Dentists who offer oral sedation will have particular preferences, depending on their experience (and experiences) with various drugs. Commonly prescribed benzos include:

Temazepam (Restoril)

Temazepam is quite frequently used in the UK. In contrast to Valium, its half-life is about 10 hours, so quite a bit shorter. It kicks in after about half an hour. The recommended dose is 10 – 40 mg (with the most common one being 30 mg). Why this huge range? In some people 40 mg of temazepam produces minimal effects whilst in others as little as 10 mg produces profound sedation. This is a problem with all benzos – there is no known method of identifying who is susceptible and who is resistant to benzodiazepines.

Diazepam (Valium)

Diazepam produces a mild level of sleep and amnesia, and takes effect about an hour after taking it. The average dose for an adult is 5 to 10 mg. The disadvantage of diazepam is that it stays in the system for much longer than it is needed (it has a half-life of 20-100 hours).

Lorazepam (Ativan)

Lorazepam can produce a higher level of sleepiness and memory loss than diazepam. The usual dose is 2 to 3 mg. It kicks in after about one hour, like diazepam, but its half-life is much shorter (12 to 14 hours).

Midazolam (Versed)

Midazolam is a short-acting benzo which can produce high levels of sleepiness and memory loss. It is given as a syrup or mixed into a (non-alcoholic) drink. The drink would usually be given at the dentist’s. It kicks in very quickly, after about 10-20 minutes.

Triazolam (Halcion)

This is not available in the U.K., but is hugely popular in the U.S. Unlike the other benzos mentioned here, it is not so much used as a premedication, but as an alternative to IV sedation in the dental office. This can work really well for some people and many swear by it! But as with all benzos, other people find it has little effect on them.

Can I take benzos as a premedication before IV sedation?

Yes you can. You must however let your dentist know that you have taken them and what dose (unless your dentist has prescribed them and knows anyway). Be sure to inform your dentist beforehand, rather than on the day, because you may forget to mention it otherwise.

  1. Sedative-Hypnotics:     drugs which induce a calming effect, including drowsiness (“sedation”). In higher doses, they induce a state resembling     physiological sleep (“hypnosis”).
  2.     Anti-Anxiety     Drugs: drugs which act primarily to relieve anxiety and make you feel calm.

When not to take benzodiazepines (contraindications)

This varies from drug to drug. For example, some benzos are safe to take if you have liver problems, while others are not, and some are safe to take if you have heart problems, while others are not. You should be sure to inform your doctor or dentist if any of the following apply: known allergy to the drug, narrow-angle glaucoma, pregnancy, severe respiratory disease (COPD), congestive heart failure (CHF), impaired kidney or liver function, depression/bipolar disorder/psychoses, chronic bronchitis and some other conditions. Also if you’re taking other medications be sure to mention this.

Oral sedation – A hit-and-miss affair?

One problem associated with oral sedation is that it can be a bit of a hit-and-miss affair. 

Basically, you don’t know how well the drug will be absorbed from the stomach. Because the response to a drug is unpredictable anyway, you have to tailor the dose so that the 25% of people most susceptible to the drug won’t get an overdose. But that means that the 25% who are least susceptible won’t get enough… Body weight, height, or gender are not good indicators of how high the “ideal dose” should be, because the drug exercises its effects on the nerve cells in the brain. So, if you’re quite large, don’t take a little extra “just in case”. A standard dose might have virtually no effect on a petite female, but a large guy might be totally zonked after taking the same dose… you get the picture!

Other factors which may affect how well a benzo will work include whether you want it to work and your (and your doctor’s/dentist’s!) belief that it will work (the so-called “placebo effect”, which, BTW, has been shown to work even if you’re aware of it). If you don’t want the drug to work, for example because you’re scared of losing control, your brain may try and fight the effects of the drug. As a result, you may not experience much of an effect at all, or else experience the effect as unpleasant. In which case, oral sedation may not be for you.

Zolpidem (Ambien)

Ambien is a sedative/hyppnotic drug designed to relax you and help you fall asleep. So it can be useful for the night before an appointment. It is chemically similar to benzodiazepines. It is not a barbiturate (the traditional “sleeping pill”, which thankfully has fallen out of favour).


While alcohol is another CNS depressant, its use as a sedative in dentistry has never been popular :sad:. Still, alcohol has long been used by apprehensive patients as a means of self-medication before dental appointments. Some people find that a G&T or a glass of wine before their appointment does the trick:

Don’t go overboard, though! You’re not doing your dentist or yourself any favours by stumbling in reeking of beer and whisky ?¬タᆭ If possible, alcohol should be avoided before any actual treatment:

The alcohol won’t interfere with the local anaesthetic, but it will cause the local to be less effective due to the vasodilation effect and it will also cause any bleeding to be worse.” (Gordon Laurie, BDS)

Herbal Alternatives

No, not THAT herb!!! no, I’m talking about “rescue remedy”!

Rescue Remedy

Rescue remedy is the most famous of the Bach flower remedies (which you may have heard of). Unlike the other Bach flower remedies, this one is a mix of five different remedies (Cherry Plum, Clematis, Impatiens, Rock Rose and Star of Bethlehem) which can make you feel more calm and relaxed during a stressful time or event.

You may be inclined to think “homeopathy? – bah, humbug”. And who could blame you? Homeopathy is about taking a substance and diluting it… then diluting it again… and again… until you are left with a solution which contains such a weak dilution that there isn’t any of the original substance left (still, some people swear by it. Personally, I reckon it’s a placebo effect – but placebos have been shown to be almost as efficient as “the real thing” in many instances and don’t have any side-effects, so what the heck?)

Actually, Bach flower remedies aren’t homeopathic. Unlike homeopathic remedies, they contain an actual diluted herbal extract in alcohol (the alcohol is there as a preservative). Rescue remedy has received some rave reviews from people trying to calm their nerves before a dental appointment (and in the days or weeks leading up to the first appointment) – so why not give it a try? You’ve got nothing to lose, as there are no side effects. It’s the only form of oral sedation which will allow you to drive to and from your appointment on your own.

Dosage: “In an emergency Rescue Remedy can be taken neat from the bottle, four drops at a time, and as frequently as required. Otherwise put four drops in a glass of water and take frequent sips until the emotions have calmed.” (from the Bach Centre’s website, Rescue remedy is available in most pharmacies and natural health stores.


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January 19, 2018
Inhalation Sedation (laughing gas) in Dentistry
 image courtesy of crimson dental

Inhalation sedation, laughing gas, relative analgesia, happy gas, gas and air, nitrous, nitrous oxide, N2O-O2. Inhalation sedation with nitrous oxide (N2O) and oxygen (O2) has been described as nearly the "Ideal sedative" in the dental office.

What is it? And what does it do?

Nitrous oxide induces a pleasurable feeling. After 5 minutes or so of breathing in the gas, you should feel a euphoric feeling spread throughout your body (kinda the same feeling as when you are feeling that the alcohol drinks are getting to you).

It really kind of feels like a ‘happy drunk’ feeling. Some people find that there are auditory or visual effects as well. You will feel a bit light headed and often people ...