Akupen Im/iv Injection, Tablet

Akupen is a non-opioid analgesic and though it acts centrally, its mechanism is not defined. It also exerts antimuscarinic and sympathomimetic actions.


Akupen Hydrochloride is used for the relief of acute pain, including post-operative, dental, musculo-skeletal and acute traumatic pain. It is also used for chronic pain like cancer pain.

Akupen is also used to associated treatment for these conditions: Pain

Trade Name Akupen
Generic Nefopam
Other Names Nefopam
Weight 20mg/ml, 30mg
Type Im/iv Injection, Tablet
Formula C17H19NO
Weight Average: 253.345
Monoisotopic: 253.146664236
Therapeutic Class Non opioid analgesics, Non-Opioid Analgesics
Manufacturer Acme Laboratories Limited
Available Country Bangladesh
Last Updated: June 23, 2021 at 11:23 am


Akupen dosage


  • Adults: Dosage may range from 30 to 90 mg three times daily depending on response. The recommended starting dosage is 2 tablets three times daily.
  • Elderly: Elderly patients may require reduced dosage due to slower metabolism. It is strongly recommended that the starting dose does not exceed 1 tablet 3 times daily.


  • Adult: 20 mg by IM injection, repeated every 6 hours if necessary. It also be given by slow IV injection in similar dose.
  • Children: Not recommended for children under the age of 12 years.

Side Effects

Akupen Hydrochloride is generally well tolerated. However the most common side-effects are nausea, nervousness, dry mouth, lightheadedness and urinary retention.The less common side-effects are vomiting, blurred vision, drowsiness, sweating, insomnia, headache, confusion, hallucinations, tachycardia and aggravation of angina.


Akupen Hydrochloride should be used with caution in patients with glaucoma and with or at risk of urinary retention. Caution should be exercised when Akupen is administered concurrently with tricyclic antidepressants. Caution should also be exercised in patients with a history of ischaemic heart disease.

Pregnancy & Breastfeeding use

Pregnancy: Akupen Hydrochloride is not recommended for pregnant women. 

Lactation: Evidence suggests that nefopam is excreted in human milk. A decision should made whether to discontinue nursing or discontinue the medication, taking into account the potential for adverse effects for the foetus and the importance of treatment to the mother.


Akupen Hydrochloride is contraindicated in patients with a history of convulsive disorders and should not be given to patients taking monoamine oxidase (MAO) inhibitors. It is also should not be used in the treatment of myocardial infarction.

Acute Overdose

Akupen toxicity is manifested by neurological symptoms (convulsions, hallucinations, agitation) and cardiovascular response (tachycardia with hyperdynamic circulation). Supportive treatment is suggested including gastric lavage, forced emesis and diuresis. Oral administration of activated charcoal may help prevent absorption. Convulsions and hallucinations may be controlled with diazepam. Beta-adrenergic blockers may be of use in controlling the cardiovascular complications.

Akupen contains Nefopam see full prescribing information from innovator Monograph