Phenobarbital and belladonna make up an antispasmodic. Phenobarbital, according to Drugs.com, slows the activity of the brain and nervous system. Belladonna alkaloids produce several results in the body, including minimizing muscle spasms in the digestive or urinary tract and reducing fluid secretions from specific glands or organs, as explained by Drugs.com. The two drugs combined are used to treat irritable bowel syndrome and ulcers in the intestine. As with any medication, antispasmodics have the risk of side effects.
Less Serious Side Effects
The most commonly occurring side effects, as identified by Drugs.com, include drowsiness, blurred vision, increased sensitivity to light, dry mouth, decreased taste sensation, reduction in sweating or urination, headache, dizziness, weakness, insomnia, nausea, vomiting, constipation, bloating, restlessness, excitability, impotence, decreased interest in sex or trouble reaching an orgasm.
Serious Side Effects
Drugs.com warns that users should discontinue antispasmodics if any of the following serious side effects occur: diarrhea, painful urination, difficulty urinating, rapid pulse, pounding heartbeat, blurred vision with eye pain, seeing halos around lights, feeling as if you might pass out, mouth sores, red or bleeding gums or tooth decay after long-term use.
Allergic Reaction
Some individuals may be sensitive or have allergies to antispasmodics. RxList.com points out the serious signs of allergy: hives, difficulty breathing, swelling of the face, swelling of the lips, swelling of the tongue or swelling of the throat. These symptoms can lead to anaphylaxis if the airways continue to close.
Complications
Some users may experience serious complications with antispasmodics. RxList.com indicates that some individuals may experience withdrawal symptoms like delirium or convulsions. Heatstroke and fever can be more likely in individuals using belladonna alkaloids due to a reduction in sweating. RxList.com also indicates complications such as intestinal obstruction, accidents from blurred vision or the decreased effect of anticoagulants.
Phenobarbital is habit forming and should not be used by individuals with history of physical or psychological dependence upon drugs, as indicated by RxList.com.
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