Biltricide Side Effects
Generic Name: praziquantel
Note: This page contains information about the side effects of praziquantel. Some of the dosage forms included on this document may not apply to the brand name Biltricide.
Not all side effects for Biltricide may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.
For the Consumer
Applies to praziquantel: oral tablet
In addition to its needed effects, some unwanted effects may be caused by praziquantel (the active ingredient contained in Biltricide). In the event that any of these side effects do occur, they may require medical attention.
You should check with your doctor immediately if any of these side effects occur when taking praziquantel:Incidence not known
- Abdominal or stomach discomfort with or without nausea
- abdominal or stomach pain
- black, tarry stools
- bloody diarrhea
- chest pain or discomfort
- fast, slow, or irregular heartbeat
- joint pain, stiffness, or swelling
- lightheadedness, dizziness, or fainting
- painful or difficult urination
- redness of the skin
- severe abdominal or stomach pain
- shortness of breath
- slow or irregular heartbeat
- sore throat
- sores, ulcers, or white spots on the lips or in the mouth
- swelling of the eyelids, face, lips, hands, or feet
- swollen glands
- tightness in the chest
- troubled breathing or swallowing
- unusual bleeding or bruising
- unusual tiredness or weakness
Some of the side effects that can occur with praziquantel may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:More common
- increased sweating
- general feeling of discomfort or illness
- nausea or vomiting
- Skin rash, hives, or itching
- Difficulty with moving
- dizziness or lightheadedness
- feeling of constant movement of self or surroundings
- hives or welts
- joint pain
- lack or loss of strength
- loss of appetite
- muscle aching or cramping
- muscle pains or stiffness
- redness of the skin
- sensation of spinning
- sleepiness or unusual drowsiness
- swollen joints
- weight loss
For Healthcare Professionals
Applies to praziquantel: compounding powder, oral tablet
Side effects varied according to dose and duration of praziquantel (the active ingredient contained in Biltricide) therapy. Side effects depended on parasite species, extent of infestation, infection duration, and parasite location in the body. Side effects occurred earlier and were more frequent and/or serious in patients with severe infestation.
Often, it was unclear if praziquantel, an endogenous reaction to parasites dying from the drug, or symptoms of the infestation caused the reported side effects.
Side effects included malaise, headache, dizziness, abdominal discomfort (with or without nausea), rise in temperature, and urticaria; generally in order of severity. Such side effects were more frequent and/or serious in patients with heavy worm burden.
The inflammatory reaction produced by antigenic substances released from dying cysts frequently involved increased intracranial pressure, seizures, severe headaches, nausea, and vomiting. In areas where Taenia solium was endemic, these reactions may occur as the result of undiagnosed cysticercosis in patients being treated for other parasitic infections. The duration of the reaction differs among patients. Delayed reactions have been reported.
Very common (10% or more): Headache, dizziness
Common (1% to 10%): Vertigo, somnolence (including drowsiness)
Very rare (less than 0.01%): Seizures
Frequency not reported: Cerebral inflammatory reaction
Postmarketing reports: Convulsion, somnolence, vertigo
Very common (10% or more): Gastrointestinal and abdominal pains, nausea, vomiting
Common (1% to 10%): Diarrhea
Frequency not reported: Abdominal discomfort (with or without nausea), gagging
Postmarketing reports: Abdominal pain, bloody diarrhea, vomiting
A syndrome of severe abdominal pain and bloody diarrhea was reported less often during schistosomiasis therapy.
Gagging and vomiting have been reported due to the bitter taste of the tablets.
Very common (10% or more): Fatigue
Common (1% to 10%): Feeling unwell (asthenia, malaise), fever
Frequency not reported: Rise in temperature, transient edema
Very rare (less than 0.01%): Polyserositis
Postmarketing reports: Asthenia, fatigue
A 13-year-old male developed Mazzotti reaction after treatment with ivermectin, praziquantel (the active ingredient contained in Biltricide) and albendazole for presumptive schistosomiasis and strongyloidiasis. Six days after receiving standard empiric therapy, he developed epigastric pain, vomiting, and urticaria. This progressed in 4 hours and included fever, general myalgia, and edema of the face, lower extremities, and penis accompanied by urticaria of the arms, legs, and trunk. He was diagnosed with a Mazzotti reaction and treated with methylprednisolone; symptoms subsided within 12 hours.
Very common (10% or more): Urticaria
Common (1% to 10%): Rash
Very rare (less than 0.01%): Pruritus
Frequency not reported: Mazzotti-like reaction
Postmarketing reports: Pruritus, rash
Common (1% to 10%)/Postmarketing reports: Anorexia
Common (1% to 10%)/Postmarketing reports: Myalgia
Frequency not reported: Musculoskeletal aches and fatigue
Frequency not reported: Mild increases in liver enzymes
Very rare (less than 0.01%): Unspecified arrhythmias
Postmarketing reports: Arrhythmia (including bradycardia, ectopic rhythms, ventricular fibrillation, atrioventricular blocks)
Postmarketing reports: Allergic reaction (generalized hypersensitivity, including polyserositis)
Postmarketing reports: Eosinophilia
More about Biltricide (praziquantel)
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