SIDE EFFECTS
The most frequently reported adverse reactions are
lightheadedness, dizziness, sedation, nausea and vomiting. These effects seem
to be more prominent in ambulatory than in nonambulatory patients, and some of
these adverse reactions may be alleviated if the patient lies down.
Other adverse reactions include:
Central Nervous System
Drowsiness, mental clouding, lethargy, impairment of
mental and physical performance, anxiety, fear, dysphoria, psychic dependence,
mood changes.
Gastrointestinal System
Prolonged administration of hydrocodone bitartrate and
acetaminophen tablets may produce constipation.
Genitourinary System
Ureteral spasm, spasm of vesical sphincters and urinary
retention have been reported with opiates.
Respiratory Depression
Hydrocodone bitartrate may produce dose-related respiratory
depression by acting directly on the brain stem respiratory centers (see OVERDOSAGE).
Special Senses
Cases of hearing impairment or permanent loss have been
reported predominantly in patients with chronic overdose.
Dermatological
Skin rash, pruritus.
The following adverse drug events may be borne in mind as
potential effects of acetaminophen: allergic reactions, rash, thrombocytopenia,
agranulocytosis.
Potential effects of high dosage are listed in the OVERDOSAGE
section.
Drug Abuse And Dependence
Controlled Substance
Hydrocone bitartrate and acetaminophen tablets is
classified as a Schedule II controlled substance.
Abuse And Dependence
Psychic dependence, physical dependence, and tolerance
may develop upon repeated administration of narcotics; therefore, this product
should be prescribed and administered with caution. However, psychic dependence
is unlikely to develop when hydrocodone bitartrate and acetaminophen tablets
are used for a short time for the treatment of pain.
Physical dependence, the condition in which continued
administration of the drug is required to prevent the appearance of a
withdrawal syndrome, assumes clinically significant proportions only after
several weeks of continued narcotic use, although some mild degree of physical
dependence may develop after a few days of narcotic therapy. Tolerance, in
which increasingly large doses are required in order to produce the same degree
of analgesia, is manifested initially by a shortened duration of analgesic effect,
and subsequently by decreases in the intensity of analgesia. The rate of
development of tolerance varies among patients.
DRUG INTERACTIONS
Patients receiving other narcotics, antihistamines,
antipsychotics, antianxiety agents, or other CNS depressants (including
alcohol) concomitantly with hydrocodone bitartrate and acetaminophen tablets may
exhibit an additive CNS depression. When combined therapy is contemplated, the
dose of one or both agents should be reduced.
The use of MAO inhibitors or tricyclic antidepressants
with hydrocodone preparations may increase the effect of either the
antidepressant or hydrocodone.
Drug/Laboratory Test Interactions
Acetaminophen may produce false-positive test results for
urinary 5-hydroxyindoleacetic acid.