What should I avoid while taking hyoscyamine?
Avoid taking antacids at the same time you take hyoscyamine. Antacids can make it
harder for your body to absorb hyoscyamine. If you use an antacid, take it after you have taken
hyoscyamine and eaten a meal.
Hyoscyamine can cause side effects that may impair your vision, thinking, or
reactions. Be careful if you drive or do anything that requires you to be awake and able to see
clearly.
Avoid drinking alcohol. It can increase drowsiness and dizziness while you are
taking hyoscyamine.
Avoid becoming overheated or dehydrated during exercise and in hot weather. Because
hyoscyamine reduces sweating, it can increase your risk of heat stroke.
What are the possible side effects of hyoscyamine?
Get emergency medical help if you have any of these
signs of an allergic
reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using hyoscyamine and call your doctor at once if you have any of these serious
side effects:
Less serious side effects may include:
-
dizziness, drowsiness, feeling nervous;
-
blurred vision, headache;
-
sleep problems (insomnia);
-
nausea, vomiting, bloating, heartburn, or constipation;
-
changes in taste;
-
problems with urination;
-
decreased sweating;
-
dry mouth; or
-
impotence, loss of interest in sex, or trouble having an
orgasm.
This is not a complete list of side effects and others may occur. Tell
your doctor about any unusual or bothersome side effect.
What other drugs will affect hyoscyamine?
Before taking this medication, tell your doctor if you are using any of the following drugs:
-
amantadine (Symmetrel);
-
haloperidol (Haldol);
-
an MAO inhibitor such as isocarboxazid (Marplan),
phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine
(Parnate);
-
phenothiazines such as chlorpromazine (Thorazine),
fluphenazine (Prolixin), mesoridazine (Serentil), perphenazine (Trilafon), prochlorperazine
(Compazine), thioridazine (Mellaril), or trifluperazine (Stelazine); or
-
antidepressants such as amitriptyline (Elavil, Etrafon),
amoxapine (Ascendin), clomipramine (Anafranil), desipramine (Norpramin), doxepin
(Sinequan), imipramine (Janimine, Tofranil), nortriptyline (Pamelor), protriptyline (Vivactil), or
trimipramine (Surmontil).
This list is not complete and there may be other drugs that can interact
with hyoscyamine. Tell your doctor about all the prescription and over-the-counter medications
you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other
doctors. Do not start using a new medication without telling your doctor.
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