It also helps loosen phlegm from chest congestion so that you can cough it up and spit it out. Robitussin DM comes in a liquid form that you take by mouth. Rheumatoid arthritis methotrexate therapy hydroxychloroquine monotherapy Cost of generic plaquenil Robitussin prescribing information indicates that people with high blood-pressure should avoid using this medication 2. Most over-the-counter cold medications contain ingredients that exacerbate hypertension. There are alternative medications that relieve cold and flu symptoms available for people with high blood pressure. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is. If you have an allergy to guaifenesin, dextromethorphan, or any other part of Robitussin DM guaifenesin and dextromethorphan liquid. If you are allergic to Robitussin DM guaifenesin and dextromethorphan liquid; any part of Robitussin DM guaifenesin and dextromethorphan liquid; or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had. Robitussin DM contains two active ingredients: dextromethorphan and guaifenesin. It comes in regular-strength, maximum-strength, sugar-free, and children’s formulations. Tussin dm and hydroxychloroquine interaction Plaquenil hydroxychloroquine sulfate dose, indications., Tizanidine Oral Interactions with Other Medication Hydroxychloroquine vidalHow to get chloroquineCan a pregnant woman take chloroquinePlaquenil cause heart regur Learn about drug interactions between sertraline oral and dextromethorphan-guaifenesin oral and use the RxList drug interaction checker to check drug combinations. Drugs A-Z Pill Identifier Supplements Symptom Checker Diseases Dictionary Media Sertraline oral and dextromethorphan-guaifenesin oral Drug Interactions.. Robitussin DM Indications, Side Effects, Warnings -. Robitussin-DM Oral Uses, Side Effects, Interactions.. Influence of hydroxychloroquine on the bioavailability of oral metoprolol Article in British Journal of Clinical Pharmacology 496549 - 554 June 2000 with 157 Reads How we measure 'reads' Guaifenesin is an expectorant. It helps loosen congestion in your chest and throat, making it easier to cough out through your mouth. Dextromethorphan and guaifenesin is a combination medicine used to treat cough and chest congestion caused by the common cold, infections. Tussin DM. Generic Name dextromethorphan hydrobromide and guaifenesin. Dosage Form oral liquid. Medically reviewed by Last updated on Nov 1, 2018. Disclaimer Most OTC drugs are not reviewed and approved by FDA, however they may be marketed if they comply with applicable regulations and policies.