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Systematic (IUPAC) name
Clinical data
  • C (US)
Routes of
Legal status
Legal status
CAS Number 92-12-6
ATC code none
PubChem CID 7077
Chemical data
Formula C17H21NO
Molar mass 255.359[[Script error: No such module "String".]]
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Phenyltoloxamine is an antihistamine with sedative and analgesic effects. It is a member of the ethanolamine class of antihistaminergic agents and an anticholinergic.

Common use

Phenyltoloxamine is widely used in preparations as an enhancing agent for some analgesics and antitussives (acetaminophen, codeine, hydrocodone). It is widely used in certain parts of the world as cough suppressant usually with codeine.

Phenyltoloxamine has analgesic and anti-spasmodic properties of its own[citation needed] and is used in combination with paracetamol, aspirin and other salicylates and other drugs in proprietary preparations available over the counter for backache, muscle strains and similar conditions. Doan's Pills, Momentum Extra Strength and Vicks Percogesic original formulation are some examples of these medications. In this respect, it is similar to a closely-related antihistamine, orphenadrine, and both drugs are very closely related to diphenhydramine and to doxylamine, the latter of which is the active ingredient in NyQuil and many other cough preparations.[citation needed]

Phenyltoloxamine is one of the more effective potentiators of codeine and derivatives such as ethylmorphine, dihydrocodeine, oxycodone, nicocodeine, hydrocodone and similar drugs like tramadol and propoxyphene for all indications, pain relief and cough suppression in particular.[citation needed]

Phenyltoloxamine, like diphenhydramine and doxylamine, is an effective non-narcotic anti-tussive on its own but tends to be effective only for productive coughs as the anticholinergic action will exacerbate dry, unproductive coughs, so it is often combined with dextromethorphan, codeine, ethylmorphine, dihydrocodeine, or hydrocodone in cough suppressants both over the counter and prescription.[citation needed]

It is also used to discourage abuse in certain opiate analgesics due its unpleasant side effects at high doses.[citation needed] While therapeutic doses of phenyltoloxamine can generate mild to moderate euphoria as can many of its close chemical relatives[citation needed], much higher doses have a side effect profile similar to that of atropine, which is also used in this fashion for tablets of diphenoxylate and morphine for oral administration.[citation needed]

Adverse effects

Common adverse effects are those associated with most anticholinergics, effects are more pronounced in children and the elderly.


Phenyltoloxamine is available in most countries, though it is rare in several western countries it remains widely used around the world, particularly in the developing world.

It is not a controlled substance; however some preparations contain opiates such as codeine or hydrocodone and are controlled. When used in preparations with acetaminophen it is generally over the counter.

Phenyltoloxamine combinations are sold under wide variety of preparations, brand names and dosages around the world:

  • Ed-Flex, Dologesic, Duraxin, Flextra-650, Novagesic, Pain-gesic, Phenylgesic, Percogesic - North America
  • Codipront - Europe/South America


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