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https://www.benzo.org.uk/bzequiv.htm
Benzodiazepines1
 ATC
Half-life (hrs)2
[active metabolite]
Approximately Equivalent
Oral dosages (mg)3
Market Aim4
Alprazolam
(Xanax, Xanor, Tafil)		 N05BA12
6-12
0.5
a
ALPRAZOLAM
ALPRAZOLAM-GENERICS SATURNIL XANAX
Bromazepam
(Lexotan, Lexomil)		 N05BA08
10-20
5-6
a
Chlordiazepoxide
(Librium)		 N05BA02
5-30 [36-200]
25
a
Clobazam
(Frisium)5		 N05BA09
12-60
20
a,e
Clonazepam
(Klonopin, Rivotril)5
18-50
0.5
a,e
Clorazepate
(Tranxene)
[36-200]
15
a
Diazepam
(Valium)		 N05BA01
20-100 [36-200]
10
a
Estazolam
(ProSom, Nuctalon)
10-24
1-2
h
Flunitrazepam
(Rohypnol)
18-26 [36-200]
1
h
Flurazepam
(Dalmane)
[40-250]
15-30
h
Halazepam
(Paxipam)
[30-100]
20
a
Ketazolam
(Anxon)
30-100 [36-200]
15-30
a
Loprazolam
(Dormonoct)
6-12
1-2
h
Lorazepam
(Tavor)		 N05BA06
10-20
1
a
Lormetazepam
(Noctamid)
10-12
1-2
h
Medazepam
(Nobrium)
36-200
10
a
Nitrazepam
(Mogadon)
15-38
10
h
Nordazepam
(Nordaz, Calmday)
36-200
10
a
Oxazepam
(Serax, Serenid,
Serepax, Seresta)
4-15
20
a
Prazepam
(Centrax, Lysanxia)		 N05BA11
[36-200]
10-20
a
Quazepam (Doral)
25-100
20
h
Temazepam
(Restoril, Normison,
Euhypnos)
8-22
20
h
Triazolam
(Halcion)
2
0.5
h
Non-benzodiazepines
with similar effects 1, 6
 
 
 
Zaleplon
(Sonata)
2
20
h
Zolpidem
(Ambien, Stilnoct, Stilnox)		 N05CF02
2
20
h
Zopiclone
(Zimovane, Imovane)
5-6
15
h
Eszopiclone
(Lunesta)
6
(9 in elderly)
3
h

  1. All these drugs are recommended for short-term use only (2-4 weeks maximum). See 1988 Guidelines.

  2. Half-life: time taken for blood concentration to fall to half its peak value after a single dose. Half-life of active metabolite shown in square brackets. This time may vary considerably between individuals.

  3. These equivalents do not agree with those used by some authors. They are firmly based on clinical experience during switch-over to diazepam at start of withdrawal programs but may vary between individuals.

  4. Market Aim: Although all benzodiazepines have similar actions, they are usually marketed as anxiolytics (a), hypnotics (h) or anticonvulsants (e).

  5. In the UK clobazam (Frisium) and clonazepam (Rivotril) are licensed for use as anti-epileptics only.

  6. These drugs are chemically different from benzodiazepines but have the same effects on the body and act by the same mechanisms.