APO-Go Pen Side Effects
Generic name: apomorphine
Medically reviewed by Drugs.com. Last updated on Mar 6, 2021.
Note: This document contains side effect information about apomorphine. Some of the dosage forms listed on this page may not apply to the brand name APO-Go Pen.
For the Consumer
Applies to apomorphine: subcutaneous solution
Other dosage forms:
Side effects requiring immediate medical attention
Along with its needed effects, apomorphine (the active ingredient contained in APO-Go Pen) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking apomorphine:
- bladder pain
- bloody or cloudy urine
- chest pain or pressure
- decreased urination
- difficult, burning, or painful urination
- dilated neck veins
- dry mouth extreme
- feeling sad or empty
- frequent urge to urinate
- increase in heart rate
- irregular breathing or heartbeat
- lack of appetite
- loss of interest or pleasure
- lower back or side pain
- rapid breathing
- seeing, hearing, or feeling things that are not there
- sleepiness or unusual drowsiness
- sore throat
- sunken eyes
- swelling of face, fingers, feet, or lower legs
- tightness in the chest
- trouble breathing
- trouble concentrating
- trouble sleeping
- twitching, twisting, uncontrolled repetitive movements of the tongue, lips, face, arms, or legs
- unusual tiredness or weakness
- weight gain
- wrinkled skin
Side effects not requiring immediate medical attention
Some side effects of apomorphine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
- Arm, back, or leg pain
- bleeding, blistering, burning, coldness, discoloration of the skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the injection site
- difficulty in moving
- increased sweating
- joint pain
- large, flat, blue or purplish patches in the skin
- muscle pain or stiffness
- runny nose
For Healthcare Professionals
Applies to apomorphine: compounding powder, subcutaneous solution, sublingual film
The most commonly reported adverse reactions have included yawning, drowsiness/somnolence, dyskinesias, dizziness/postural hypotension, rhinorrhea, nausea, vomiting, hallucination/confusion, and edema/swelling of extremities.
Very common (10% or more): Nausea and/or vomiting (30%)
Common (1% to 10%): Constipation, diarrhea
This drug is known to cause severe nausea and vomiting when administered at recommended doses; because of this, premedication with antiemetics is recommended. In a clinical trial in which patients received premedication with trimethobenzamide, 31% and 11% of patients had nausea and vomiting, respectively.[Ref]
Rare (0.01% to 0.1%): QTc interval prolongation
Concomitant use of ondansetron with apomorphine has resulted in profound hypotension and loss of consciousness. Because of this, US labeling has concomitant use of 5HT3 antagonists and apomorphine as contraindicated.
Thrombus formation due to intravenous crystallization of apomorphine has occurred with IV administration; this drug should not be administered IV.
In clinical studies, 4% of patients receiving this drug experienced angina, myocardial infarction, cardiac arrest and/or sudden death. The specific incidence of each event is unknown; some cases of angina and myocardial infarction occurred in close proximity to apomorphine administration, while other cases of cardiac arrest and sudden death occurred at time not related to dosing.
In a placebo-controlled study, single apomorphine doses from 2 mg to 8 mg resulted in mean differences from placebo in QTc (as measured by Holter monitor) of 0, 1, and 7 milliseconds with 4, 6, and 8 mg does, respectively. In another study, single-doses of apomorphine 2 to 10 mg (mean 5.2 mg) resulted in a mean difference in QTc interval of about 3 milliseconds at 20- and 90-minutes post-dose. For the entire study, 2 patients exhibited larger QTc increases (greater than 60 milliseconds from pre-dose; 1 patient at 2 and 6 mg; 1 patient at 6 mg).[Ref]
Very common (10% or more): Hallucinations (up to 14%)
Frequency not reported: Impulse control/compulsive behaviors
Postmarketing reports: New or worsening mental status and behavioral changes including psychotic-like behavior, paranoid ideation, delusions, disorientation, aggressive behavior, agitation, and delirium[Ref]
For patients taking medications that increase central dopaminergic tone including this drug, there have been case reports of intense urges to gamble, increased sexual urges, intense urges to spend money uncontrollably, and the inability to control these urges.[Ref]
Very common (10% or more): Falls (up to 30%)
Common (1% to 10%): Fatigue[Ref]
Very common (10% or more): Injection site reactions (26%)
Frequency not reported: Panniculitis[Ref]
Very common (10% or more): Drowsiness or somnolence (up to 35%), dyskinesia (up to 35%)
Common (1% to 10%): Headache, aggravated Parkinson's disease, weakness
Frequency not reported: Falling asleep during activities of daily living
Injection site reactions including bruising, granuloma, and pruritus have occurred with subcutaneous injections. Local induration and nodules (usually asymptomatic) often develop with continuous use. At higher doses, erythema, tenderness and induration at site of subcutaneous injection may occur. Panniculitis has been reported when a skin biopsy has been performed.[Ref]
Common (1% to 10%): Urinary tract infection
Uncommon (0.1% to 1%): Spontaneous penile erection
Rare (0.01% to 0.1%): Painful erection
Common (1% to 10%): Ecchymosis
Uncommon (0.1% to 1%): Thrombocytopenia
Sodium metabisulfite is an excipient in many apomorphine solutions. Angioedema and anaphylaxis and bronchospasm have been reported with this excipient in sulfite sensitive individuals.
Common (1% to 10%): Limb pain, arthralgia, back pain
Uncommon (0.1% to 1%): Increased lacrimation
Common (1% to 10%): Dehydration
Pulmonary embolism due to intravenous crystallization of apomorphine (the active ingredient contained in APO-Go Pen) has occurred with IV administration; this drug should not be administered IV.
Very common (10% or more): Yawning (40%), rhinorrhea (20%)
Uncommon (0.1% to 1%): Breathing difficulties
Frequency not reported: Pulmonary embolism
Uncommon (0.1% to 1%): Reduced facial hair growth, local and generalized rashes
Uncommon (0.1% to 1%): Transient rise in serum prolactin, loss of libido
More about APO-Go Pen (apomorphine)
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Interactions
- Drug class: dopaminergic antiparkinsonism agents
Related treatment guides
1. "Product Information. Apokyn (apomorphine)." Mylan Pharmaceuticals Inc, Morgantown, WV.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.