Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Plaquenil medication class K63 ub after chloroquine Famotidine decreases acid production in the stomach. As such, Pepcid AC's purpose is an acid reducer. Pepcid AC is used to relieve heartburn associated with acid indigestion and sour stomach. CYP2D6 inhibitors, such as hydroxychloroquine, could theoretically impair propranolol metabolism; the clinical significance of such interactions is unknown. Hydrocodone Moderate Concomitant use of hydrocodone with hydroxychloroquine may increase hydrocodone plasma concentrations and prolong opioid adverse reactions, including hypotension, respiratory depression, profound sedation, coma, and death. Not for administration with other drugs that have potential to prolong QT interval; hydroxychloroquine prolongs QT interval; ventricular arrhythmias and torsades de pointes reported in patients taking hydroxychloroquine Skeletal muscle myopathy or neuropathy leading to progressive weakness and atrophy of proximal muscle groups. Hydroxychloroquine may also be used for purposes not listed in this medication guide. Hydroxychloroquine is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Hydroxychloroquine interactions with famotidine Hydroxychloroquine - Side Effects, Dosage, Interactions., Plaquenil hydroxychloroquine sulfate dose, indications. Er pr her breast cancer chloroquineHydroxychloroquine black box warningMuscle weakness with plaquenilHydroxychloroquine hair lossPlaquenil 200 mg brch Plaquenil and Pepcid. Support Forums. Two days now I've taken the Pepcid, then an hour later took the Plaquenil and it's working great. I didn't even eat this morning and didn't have a problem. BTW I talked to two pharmacists and both said that it's okay to take with the plaquenil. Plaquenil and Pepcid -. Plaquenil hydroxychloroquine sulfate dosing, indications.. Hydroxychloroquine Oral Tablet 200Mg Drug Medication Dosage Information. The study is based on hydroxychloroquine sulfate and famotidine the active ingredients of Plaquenil and Famotidine, respectively, and Plaquenil and Famotidine the brand names. Other drugs that have the same active ingredients e.g. generic drugs are not considered. Plaquenil Hydroxychloroquine is used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus & others. Drug Interactions With Hydroxychloroquine Certain parasite medications and beta blockers may cause potentially negative drug interactions with hydroxychloroquine. Some interactions can increase your risk of developing side effects, while others can reduce the effectiveness of the medications.