Inderal is a beta blocker and its generic name is propranolol. This class of drugs is used for hypertension, angina, anxiety and rapid heart beats. Side effects are fatigue, nausea, sleep disturbances, slow pulse, and impotence.
Drug-induced lupus comes on suddenly in a small number of people taking certain drugs. These medictions have to be taken over quite a long period of time and in high'ish dosages. It can mimic SLE causing joint pains, skin rashes, fatigue and some of the other SLE symptoms.
Drugs that have definite proof of an association with drug-induced lupus include - Procainamide (Procan or Pronestyl), Hydralazine (Apresoline or Apresazide), Isoniazid (INH), Quinidine, & Phenytoin (Dilantin).
The widely used acne drug Minocycline, has been shown to cause drug induced lupus symptoms.
Drugs such as Septrin, ibuprofen, sulfa drugs, don't cause drug-induced lupus is such, but they can exacerbate true underlying lupus, and then might cause lupus flares.
Drug-induced lupus is different from true lupus in that blood tests are different, heart, lung and kidney involvement is rare. Most patients don't fulfil the criteria for SLE. The symptoms stop when the drug is discontinued, although it can sometimes take up to a few weeks for them to disappear completely.
As with any medication, prescription or OTC, check on the interaction that might happen.
Hope this helps in some way. Take care