What is the treatment of emergency hypertension when sodium nitroprusside and labetalol are not in stock? Patient on telmisartan 40mg + 12.5mg hydrochlorothiazide not taken drug since 5 days and before also irregular. No symptoms except bp being 180/120 on measurement. Can nifedipine be used and how and in what dosage how many times?

What other drugs can be used? Give your view.