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Synalgos-DC Side Effects

Generic Name: aspirin / caffeine / dihydrocodeine

Note: This page contains side effects data for the generic drug aspirin / caffeine / dihydrocodeine. It is possible that some of the dosage forms included below may not apply to the brand name Synalgos-DC.

Applies to aspirin / caffeine / dihydrocodeine: oral capsule

As well as its needed effects, aspirin / caffeine / dihydrocodeine may cause unwanted side effects that require medical attention.

Major Side Effects

If any of the following side effects occur while taking aspirin / caffeine / dihydrocodeine, check with your doctor immediately:

More common:
  • Lightheadedness

If any of the following symptoms of overdose occur while taking aspirin / caffeine / dihydrocodeine, get emergency help immediately:

Symptoms of overdose:
  • Confusion
  • difficult or troubled breathing
  • extreme sleepiness
  • irregular, fast or slow, or shallow breathing
  • pale or blue lips, fingernails, or skin
  • shortness of breath

Minor Side Effects

Some aspirin / caffeine / dihydrocodeine side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common:
  • Difficulty having a bowel movement (stool)
  • dizziness
  • drowsiness
  • itching skin
  • nausea
  • relaxed and calm
  • sleepiness
  • vomiting

It is possible that some side effects of Synalgos-DC may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

More about Synalgos-DC (aspirin / caffeine / dihydrocodeine)

Consumer resources

Professional resources

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Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.